Finding the Fourth Proportional to 12,387.54, 17,100.81 and 9,379.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.54 : 17,100.81 = 9,379.74 : x
2. Step 2: Convert to fraction form
   12,387.54/17,100.81 = 9,379.74/x
3. Step 3: Cross multiply
   12,387.54x = 17,100.81 × 9,379.74
4. Step 4: Simplify right side
   12,387.54x = 160,401,151.59
5. Step 5: Solve for x
   x = 160,401,151.59/12,387.54
6. Step 6: Final answer
   x = 12,948.59