Finding the Fourth Proportional to 17,287.86, 23,807.06 and 15,018.17

Step by Step Solution

1. Step 1: Write the proportion equation
   17,287.86 : 23,807.06 = 15,018.17 : x
2. Step 2: Convert to fraction form
   17,287.86/23,807.06 = 15,018.17/x
3. Step 3: Cross multiply
   17,287.86x = 23,807.06 × 15,018.17
4. Step 4: Simplify right side
   17,287.86x = 357,538,399.19
5. Step 5: Solve for x
   x = 357,538,399.19/17,287.86
6. Step 6: Final answer
   x = 20,681.47