Finding the Fourth Proportional to 113,689.58, 156,892.70 and 65,290.89

Step by Step Solution

1. Step 1: Write the proportion equation
   113,689.58 : 156,892.70 = 65,290.89 : x
2. Step 2: Convert to fraction form
   113,689.58/156,892.70 = 65,290.89/x
3. Step 3: Cross multiply
   113,689.58x = 156,892.70 × 65,290.89
4. Step 4: Simplify right side
   113,689.58x = 10,243,663,691.05
5. Step 5: Solve for x
   x = 10,243,663,691.05/113,689.58
6. Step 6: Final answer
   x = 90,102.05