Finding the Fourth Proportional to 12,971.20, 17,901.12 and 7,382.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,971.20 : 17,901.12 = 7,382.08 : x
2. Step 2: Convert to fraction form
   12,971.20/17,901.12 = 7,382.08/x
3. Step 3: Cross multiply
   12,971.20x = 17,901.12 × 7,382.08
4. Step 4: Simplify right side
   12,971.20x = 132,147,499.93
5. Step 5: Solve for x
   x = 132,147,499.93/12,971.20
6. Step 6: Final answer
   x = 10,187.76