Finding the Fourth Proportional to 12,901,678,946.67, 17,805,211,783.89 and 7,821,257,011.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901,678,946.67 : 17,805,211,783.89 = 7,821,257,011.16 : x
2. Step 2: Convert to fraction form
   12,901,678,946.67/17,805,211,783.89 = 7,821,257,011.16/x
3. Step 3: Cross multiply
   12,901,678,946.67x = 17,805,211,783.89 × 7,821,257,011.16
4. Step 4: Simplify right side
   12,901,678,946.67x = 139,259,137,499,938,308,096
5. Step 5: Solve for x
   x = 139,259,137,499,938,308,096/12,901,678,946.67
6. Step 6: Final answer
   x = 10,793,877,143.86