Finding the Fourth Proportional to 12,971.38, 17,900.61 and 7,382.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,971.38 : 17,900.61 = 7,382.74 : x
2. Step 2: Convert to fraction form
   12,971.38/17,900.61 = 7,382.74/x
3. Step 3: Cross multiply
   12,971.38x = 17,900.61 × 7,382.74
4. Step 4: Simplify right side
   12,971.38x = 132,155,549.47
5. Step 5: Solve for x
   x = 132,155,549.47/12,971.38
6. Step 6: Final answer
   x = 10,188.24