Finding the Fourth Proportional to 87,811.10, 131,722.31 and 30,878.02

Step by Step Solution

1. Step 1: Write the proportion equation
   87,811.10 : 131,722.31 = 30,878.02 : x
2. Step 2: Convert to fraction form
   87,811.10/131,722.31 = 30,878.02/x
3. Step 3: Cross multiply
   87,811.10x = 131,722.31 × 30,878.02
4. Step 4: Simplify right side
   87,811.10x = 4,067,323,870.52
5. Step 5: Solve for x
   x = 4,067,323,870.52/87,811.10
6. Step 6: Final answer
   x = 46,319.02