Finding the Fourth Proportional to 113,578.72, 156,734.96 and 65,188.61

Step by Step Solution

1. Step 1: Write the proportion equation
   113,578.72 : 156,734.96 = 65,188.61 : x
2. Step 2: Convert to fraction form
   113,578.72/156,734.96 = 65,188.61/x
3. Step 3: Cross multiply
   113,578.72x = 156,734.96 × 65,188.61
4. Step 4: Simplify right side
   113,578.72x = 10,217,333,658.94
5. Step 5: Solve for x
   x = 10,217,333,658.94/113,578.72
6. Step 6: Final answer
   x = 89,958.17