Finding the Fourth Proportional to 72,442,066.45, 99,970,772.93 and 39,403,084.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,442,066.45 : 99,970,772.93 = 39,403,084.18 : x
2. Step 2: Convert to fraction form
   72,442,066.45/99,970,772.93 = 39,403,084.18/x
3. Step 3: Cross multiply
   72,442,066.45x = 99,970,772.93 × 39,403,084.18
4. Step 4: Simplify right side
   72,442,066.45x = 3,939,156,781,300,455.50
5. Step 5: Solve for x
   x = 3,939,156,781,300,455.50/72,442,066.45
6. Step 6: Final answer
   x = 54,376,648.46