Finding the Fourth Proportional to 115,564.38, 159,475.81 and 64,577.54

Step by Step Solution

1. Step 1: Write the proportion equation
   115,564.38 : 159,475.81 = 64,577.54 : x
2. Step 2: Convert to fraction form
   115,564.38/159,475.81 = 64,577.54/x
3. Step 3: Cross multiply
   115,564.38x = 159,475.81 × 64,577.54
4. Step 4: Simplify right side
   115,564.38x = 10,298,555,499.31
5. Step 5: Solve for x
   x = 10,298,555,499.31/115,564.38
6. Step 6: Final answer
   x = 89,115.31