Finding the Fourth Proportional to 8,391.91, 12,588.15 and 2,548.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,391.91 : 12,588.15 = 2,548.50 : x
2. Step 2: Convert to fraction form
   8,391.91/12,588.15 = 2,548.50/x
3. Step 3: Cross multiply
   8,391.91x = 12,588.15 × 2,548.50
4. Step 4: Simplify right side
   8,391.91x = 32,080,900.28
5. Step 5: Solve for x
   x = 32,080,900.28/8,391.91
6. Step 6: Final answer
   x = 3,822.84