Finding the Fourth Proportional to 105,789.52, 145,985.52 and 60,465.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,789.52 : 145,985.52 = 60,465.16 : x
2. Step 2: Convert to fraction form
   105,789.52/145,985.52 = 60,465.16/x
3. Step 3: Cross multiply
   105,789.52x = 145,985.52 × 60,465.16
4. Step 4: Simplify right side
   105,789.52x = 8,827,037,824.48
5. Step 5: Solve for x
   x = 8,827,037,824.48/105,789.52
6. Step 6: Final answer
   x = 83,439.62