Finding the Fourth Proportional to 87,345.97, 130,986.72 and 31,171.05

Step by Step Solution

1. Step 1: Write the proportion equation
   87,345.97 : 130,986.72 = 31,171.05 : x
2. Step 2: Convert to fraction form
   87,345.97/130,986.72 = 31,171.05/x
3. Step 3: Cross multiply
   87,345.97x = 130,986.72 × 31,171.05
4. Step 4: Simplify right side
   87,345.97x = 4,082,993,598.46
5. Step 5: Solve for x
   x = 4,082,993,598.46/87,345.97
6. Step 6: Final answer
   x = 46,745.07