Finding the Fourth Proportional to 8,156.43, 12,228.69 and 2,606.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.43 : 12,228.69 = 2,606.61 : x
2. Step 2: Convert to fraction form
   8,156.43/12,228.69 = 2,606.61/x
3. Step 3: Cross multiply
   8,156.43x = 12,228.69 × 2,606.61
4. Step 4: Simplify right side
   8,156.43x = 31,875,425.64
5. Step 5: Solve for x
   x = 31,875,425.64/8,156.43
6. Step 6: Final answer
   x = 3,908.01