Finding the Fourth Proportional to 115,870.72, 159,893.04 and 65,560

Step by Step Solution

1. Step 1: Write the proportion equation
   115,870.72 : 159,893.04 = 65,560 : x
2. Step 2: Convert to fraction form
   115,870.72/159,893.04 = 65,560/x
3. Step 3: Cross multiply
   115,870.72x = 159,893.04 × 65,560
4. Step 4: Simplify right side
   115,870.72x = 10,482,587,702.40
5. Step 5: Solve for x
   x = 10,482,587,702.40/115,870.72
6. Step 6: Final answer
   x = 90,467.96