Finding the Fourth Proportional to 21,955,034.56, 30,298,385.46 and 12,788,267.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,955,034.56 : 30,298,385.46 = 12,788,267.80 : x
2. Step 2: Convert to fraction form
   21,955,034.56/30,298,385.46 = 12,788,267.80/x
3. Step 3: Cross multiply
   21,955,034.56x = 30,298,385.46 × 12,788,267.80
4. Step 4: Simplify right side
   21,955,034.56x = 387,463,867,170,106.25
5. Step 5: Solve for x
   x = 387,463,867,170,106.25/21,955,034.56
6. Step 6: Final answer
   x = 17,648,064.55