Finding the Fourth Proportional to 87,085.39, 130,686.27 and 31,681.39

Step by Step Solution

1. Step 1: Write the proportion equation
   87,085.39 : 130,686.27 = 31,681.39 : x
2. Step 2: Convert to fraction form
   87,085.39/130,686.27 = 31,681.39/x
3. Step 3: Cross multiply
   87,085.39x = 130,686.27 × 31,681.39
4. Step 4: Simplify right side
   87,085.39x = 4,140,322,687.52
5. Step 5: Solve for x
   x = 4,140,322,687.52/87,085.39
6. Step 6: Final answer
   x = 47,543.25