Finding the Fourth Proportional to 21,066,414.15, 31,571,876.20 and 8,920,849.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066,414.15 : 31,571,876.20 = 8,920,849.05 : x
2. Step 2: Convert to fraction form
   21,066,414.15/31,571,876.20 = 8,920,849.05/x
3. Step 3: Cross multiply
   21,066,414.15x = 31,571,876.20 × 8,920,849.05
4. Step 4: Simplify right side
   21,066,414.15x = 281,647,941,805,487.62
5. Step 5: Solve for x
   x = 281,647,941,805,487.62/21,066,414.15
6. Step 6: Final answer
   x = 13,369,524.58