Finding the Fourth Proportional to 113,590.56, 156,758.15 and 65,196.66

Step by Step Solution

1. Step 1: Write the proportion equation
   113,590.56 : 156,758.15 = 65,196.66 : x
2. Step 2: Convert to fraction form
   113,590.56/156,758.15 = 65,196.66/x
3. Step 3: Cross multiply
   113,590.56x = 156,758.15 × 65,196.66
4. Step 4: Simplify right side
   113,590.56x = 10,220,107,807.78
5. Step 5: Solve for x
   x = 10,220,107,807.78/113,590.56
6. Step 6: Final answer
   x = 89,973.21