Finding the Fourth Proportional to 85,665.34, 118,230.60 and 49,359.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,665.34 : 118,230.60 = 49,359.72 : x
2. Step 2: Convert to fraction form
   85,665.34/118,230.60 = 49,359.72/x
3. Step 3: Cross multiply
   85,665.34x = 118,230.60 × 49,359.72
4. Step 4: Simplify right side
   85,665.34x = 5,835,829,311.43
5. Step 5: Solve for x
   x = 5,835,829,311.43/85,665.34
6. Step 6: Final answer
   x = 68,123.58