Finding the Fourth Proportional to 8,131.50, 11,221.71 and 4,987.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.50 : 11,221.71 = 4,987.02 : x
2. Step 2: Convert to fraction form
   8,131.50/11,221.71 = 4,987.02/x
3. Step 3: Cross multiply
   8,131.50x = 11,221.71 × 4,987.02
4. Step 4: Simplify right side
   8,131.50x = 55,962,892.20
5. Step 5: Solve for x
   x = 55,962,892.20/8,131.50
6. Step 6: Final answer
   x = 6,882.23