Finding the Fourth Proportional to 12,117.39, 18,171.31 and 5,100.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,117.39 : 18,171.31 = 5,100.76 : x
2. Step 2: Convert to fraction form
   12,117.39/18,171.31 = 5,100.76/x
3. Step 3: Cross multiply
   12,117.39x = 18,171.31 × 5,100.76
4. Step 4: Simplify right side
   12,117.39x = 92,687,491.20
5. Step 5: Solve for x
   x = 92,687,491.20/12,117.39
6. Step 6: Final answer
   x = 7,649.13