Finding the Fourth Proportional to 87,253.72, 130,919.46 and 45,691

Step by Step Solution

1. Step 1: Write the proportion equation
   87,253.72 : 130,919.46 = 45,691 : x
2. Step 2: Convert to fraction form
   87,253.72/130,919.46 = 45,691/x
3. Step 3: Cross multiply
   87,253.72x = 130,919.46 × 45,691
4. Step 4: Simplify right side
   87,253.72x = 5,981,841,046.86
5. Step 5: Solve for x
   x = 5,981,841,046.86/87,253.72
6. Step 6: Final answer
   x = 68,556.86