Finding the Fourth Proportional to 12,988.86, 17,925.54 and 7,324.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988.86 : 17,925.54 = 7,324.12 : x
2. Step 2: Convert to fraction form
   12,988.86/17,925.54 = 7,324.12/x
3. Step 3: Cross multiply
   12,988.86x = 17,925.54 × 7,324.12
4. Step 4: Simplify right side
   12,988.86x = 131,288,806.02
5. Step 5: Solve for x
   x = 131,288,806.02/12,988.86
6. Step 6: Final answer
   x = 10,107.80