Finding the Fourth Proportional to 87,280.56, 130,920.72 and 31,876.56

Step by Step Solution

1. Step 1: Write the proportion equation
   87,280.56 : 130,920.72 = 31,876.56 : x
2. Step 2: Convert to fraction form
   87,280.56/130,920.72 = 31,876.56/x
3. Step 3: Cross multiply
   87,280.56x = 130,920.72 × 31,876.56
4. Step 4: Simplify right side
   87,280.56x = 4,173,302,186.32
5. Step 5: Solve for x
   x = 4,173,302,186.32/87,280.56
6. Step 6: Final answer
   x = 47,814.80