Finding the Fourth Proportional to 105,737.16, 145,917 and 60,429.21

Step by Step Solution

1. Step 1: Write the proportion equation
   105,737.16 : 145,917 = 60,429.21 : x
2. Step 2: Convert to fraction form
   105,737.16/145,917 = 60,429.21/x
3. Step 3: Cross multiply
   105,737.16x = 145,917 × 60,429.21
4. Step 4: Simplify right side
   105,737.16x = 8,817,649,035.57
5. Step 5: Solve for x
   x = 8,817,649,035.57/105,737.16
6. Step 6: Final answer
   x = 83,392.15