Finding the Fourth Proportional to 105,385.34, 145,428.17 and 60,077.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,385.34 : 145,428.17 = 60,077.92 : x
2. Step 2: Convert to fraction form
   105,385.34/145,428.17 = 60,077.92/x
3. Step 3: Cross multiply
   105,385.34x = 145,428.17 × 60,077.92
4. Step 4: Simplify right side
   105,385.34x = 8,737,021,963.01
5. Step 5: Solve for x
   x = 8,737,021,963.01/105,385.34
6. Step 6: Final answer
   x = 82,905.48