Finding the Fourth Proportional to 72,442,064.45, 99,970,770.17 and 39,403,082.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,442,064.45 : 99,970,770.17 = 39,403,082.18 : x
2. Step 2: Convert to fraction form
   72,442,064.45/99,970,770.17 = 39,403,082.18/x
3. Step 3: Cross multiply
   72,442,064.45x = 99,970,770.17 × 39,403,082.18
4. Step 4: Simplify right side
   72,442,064.45x = 3,939,156,472,606,402.50
5. Step 5: Solve for x
   x = 3,939,156,472,606,402.50/72,442,064.45
6. Step 6: Final answer
   x = 54,376,645.70