Finding the Fourth Proportional to 65,150.96, 89,931.52 and 39,645.68

Step by Step Solution

1. Step 1: Write the proportion equation
   65,150.96 : 89,931.52 = 39,645.68 : x
2. Step 2: Convert to fraction form
   65,150.96/89,931.52 = 39,645.68/x
3. Step 3: Cross multiply
   65,150.96x = 89,931.52 × 39,645.68
4. Step 4: Simplify right side
   65,150.96x = 3,565,396,263.83
5. Step 5: Solve for x
   x = 3,565,396,263.83/65,150.96
6. Step 6: Final answer
   x = 54,725.15