Finding the Fourth Proportional to 105,785.15, 145,983.50 and 60,464.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,785.15 : 145,983.50 = 60,464.10 : x
2. Step 2: Convert to fraction form
   105,785.15/145,983.50 = 60,464.10/x
3. Step 3: Cross multiply
   105,785.15x = 145,983.50 × 60,464.10
4. Step 4: Simplify right side
   105,785.15x = 8,826,760,866.77
5. Step 5: Solve for x
   x = 8,826,760,866.77/105,785.15
6. Step 6: Final answer
   x = 83,440.46