Finding the Fourth Proportional to 87,809.76, 131,720.51 and 30,876.86

Step by Step Solution

1. Step 1: Write the proportion equation
   87,809.76 : 131,720.51 = 30,876.86 : x
2. Step 2: Convert to fraction form
   87,809.76/131,720.51 = 30,876.86/x
3. Step 3: Cross multiply
   87,809.76x = 131,720.51 × 30,876.86
4. Step 4: Simplify right side
   87,809.76x = 4,067,116,152.89
5. Step 5: Solve for x
   x = 4,067,116,152.89/87,809.76
6. Step 6: Final answer
   x = 46,317.36