Finding the Fourth Proportional to 115,443.59, 159,310.59 and 64,457.10

Step by Step Solution

1. Step 1: Write the proportion equation
   115,443.59 : 159,310.59 = 64,457.10 : x
2. Step 2: Convert to fraction form
   115,443.59/159,310.59 = 64,457.10/x
3. Step 3: Cross multiply
   115,443.59x = 159,310.59 × 64,457.10
4. Step 4: Simplify right side
   115,443.59x = 10,268,698,630.69
5. Step 5: Solve for x
   x = 10,268,698,630.69/115,443.59
6. Step 6: Final answer
   x = 88,949.93