Finding the Fourth Proportional to 8,786.31, 12,132.50 and 6,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.31 : 12,132.50 = 6,276.12 : x
2. Step 2: Convert to fraction form
   8,786.31/12,132.50 = 6,276.12/x
3. Step 3: Cross multiply
   8,786.31x = 12,132.50 × 6,276.12
4. Step 4: Simplify right side
   8,786.31x = 76,144,994.52
5. Step 5: Solve for x
   x = 76,144,994.52/8,786.31
6. Step 6: Final answer
   x = 8,666.32