Finding the Fourth Proportional to 10,215,200.78, 14,097,085.71 and 5,631,686.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215,200.78 : 14,097,085.71 = 5,631,686.18 : x
2. Step 2: Convert to fraction form
   10,215,200.78/14,097,085.71 = 5,631,686.18/x
3. Step 3: Cross multiply
   10,215,200.78x = 14,097,085.71 × 5,631,686.18
4. Step 4: Simplify right side
   10,215,200.78x = 79,390,362,771,282.48
5. Step 5: Solve for x
   x = 79,390,362,771,282.48/10,215,200.78
6. Step 6: Final answer
   x = 7,771,786.82