Finding the Fourth Proportional to 87,302.17, 130,956.50 and 28,138.69

Step by Step Solution

1. Step 1: Write the proportion equation
   87,302.17 : 130,956.50 = 28,138.69 : x
2. Step 2: Convert to fraction form
   87,302.17/130,956.50 = 28,138.69/x
3. Step 3: Cross multiply
   87,302.17x = 130,956.50 × 28,138.69
4. Step 4: Simplify right side
   87,302.17x = 3,684,944,216.29
5. Step 5: Solve for x
   x = 3,684,944,216.29/87,302.17
6. Step 6: Final answer
   x = 42,209.08