Finding the Fourth Proportional to 77,061.39, 106,344.09 and 54,123.45

Step by Step Solution

1. Step 1: Write the proportion equation
   77,061.39 : 106,344.09 = 54,123.45 : x
2. Step 2: Convert to fraction form
   77,061.39/106,344.09 = 54,123.45/x
3. Step 3: Cross multiply
   77,061.39x = 106,344.09 × 54,123.45
4. Step 4: Simplify right side
   77,061.39x = 5,755,709,037.91
5. Step 5: Solve for x
   x = 5,755,709,037.91/77,061.39
6. Step 6: Final answer
   x = 74,689.92