Finding the Fourth Proportional to 105,724.72, 145,896.96 and 60,402.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105,724.72 : 145,896.96 = 60,402.52 : x
2. Step 2: Convert to fraction form
   105,724.72/145,896.96 = 60,402.52/x
3. Step 3: Cross multiply
   105,724.72x = 145,896.96 × 60,402.52
4. Step 4: Simplify right side
   105,724.72x = 8,812,544,044.34
5. Step 5: Solve for x
   x = 8,812,544,044.34/105,724.72
6. Step 6: Final answer
   x = 83,353.68