Finding the Fourth Proportional to 105,734.49, 145,921.32 and 60,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,734.49 : 145,921.32 = 60,411.50 : x
2. Step 2: Convert to fraction form
   105,734.49/145,921.32 = 60,411.50/x
3. Step 3: Cross multiply
   105,734.49x = 145,921.32 × 60,411.50
4. Step 4: Simplify right side
   105,734.49x = 8,815,326,187.98
5. Step 5: Solve for x
   x = 8,815,326,187.98/105,734.49
6. Step 6: Final answer
   x = 83,372.29