Finding the Fourth Proportional to 8,117.63, 12,167.21 and 3,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,117.63 : 12,167.21 = 3,434.72 : x
2. Step 2: Convert to fraction form
   8,117.63/12,167.21 = 3,434.72/x
3. Step 3: Cross multiply
   8,117.63x = 12,167.21 × 3,434.72
4. Step 4: Simplify right side
   8,117.63x = 41,790,959.53
5. Step 5: Solve for x
   x = 41,790,959.53/8,117.63
6. Step 6: Final answer
   x = 5,148.17