Finding the Fourth Proportional to 12,167.90, 18,251.72 and 3,847.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,167.90 : 18,251.72 = 3,847.91 : x
2. Step 2: Convert to fraction form
   12,167.90/18,251.72 = 3,847.91/x
3. Step 3: Cross multiply
   12,167.90x = 18,251.72 × 3,847.91
4. Step 4: Simplify right side
   12,167.90x = 70,231,044.66
5. Step 5: Solve for x
   x = 70,231,044.66/12,167.90
6. Step 6: Final answer
   x = 5,771.83