Finding the Fourth Proportional to 115,849.32, 159,834.90 and 64,854.55

Step by Step Solution

1. Step 1: Write the proportion equation
   115,849.32 : 159,834.90 = 64,854.55 : x
2. Step 2: Convert to fraction form
   115,849.32/159,834.90 = 64,854.55/x
3. Step 3: Cross multiply
   115,849.32x = 159,834.90 × 64,854.55
4. Step 4: Simplify right side
   115,849.32x = 10,366,020,513.80
5. Step 5: Solve for x
   x = 10,366,020,513.80/115,849.32
6. Step 6: Final answer
   x = 89,478.48