Finding the Fourth Proportional to 87,311.81, 130,910.34 and 42,321.26

Step by Step Solution

1. Step 1: Write the proportion equation
   87,311.81 : 130,910.34 = 42,321.26 : x
2. Step 2: Convert to fraction form
   87,311.81/130,910.34 = 42,321.26/x
3. Step 3: Cross multiply
   87,311.81x = 130,910.34 × 42,321.26
4. Step 4: Simplify right side
   87,311.81x = 5,540,290,535.83
5. Step 5: Solve for x
   x = 5,540,290,535.83/87,311.81
6. Step 6: Final answer
   x = 63,454.08