Finding the Fourth Proportional to 115,708.72, 159,675.96 and 65,406.64

Step by Step Solution

1. Step 1: Write the proportion equation
   115,708.72 : 159,675.96 = 65,406.64 : x
2. Step 2: Convert to fraction form
   115,708.72/159,675.96 = 65,406.64/x
3. Step 3: Cross multiply
   115,708.72x = 159,675.96 × 65,406.64
4. Step 4: Simplify right side
   115,708.72x = 10,443,868,032.37
5. Step 5: Solve for x
   x = 10,443,868,032.37/115,708.72
6. Step 6: Final answer
   x = 90,259.99