Finding the Fourth Proportional to 115,561.72, 159,459.12 and 64,568.08

Step by Step Solution

1. Step 1: Write the proportion equation
   115,561.72 : 159,459.12 = 64,568.08 : x
2. Step 2: Convert to fraction form
   115,561.72/159,459.12 = 64,568.08/x
3. Step 3: Cross multiply
   115,561.72x = 159,459.12 × 64,568.08
4. Step 4: Simplify right side
   115,561.72x = 10,295,969,216.89
5. Step 5: Solve for x
   x = 10,295,969,216.89/115,561.72
6. Step 6: Final answer
   x = 89,094.98