Finding the Fourth Proportional to 115,932.72, 159,987.96 and 64,947.27

Step by Step Solution

1. Step 1: Write the proportion equation
   115,932.72 : 159,987.96 = 64,947.27 : x
2. Step 2: Convert to fraction form
   115,932.72/159,987.96 = 64,947.27/x
3. Step 3: Cross multiply
   115,932.72x = 159,987.96 × 64,947.27
4. Step 4: Simplify right side
   115,932.72x = 10,390,781,234.87
5. Step 5: Solve for x
   x = 10,390,781,234.87/115,932.72
6. Step 6: Final answer
   x = 89,627.68