Finding the Fourth Proportional to 31,143.04, 42,978.62 and 17,715.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,143.04 : 42,978.62 = 17,715.52 : x
2. Step 2: Convert to fraction form
   31,143.04/42,978.62 = 17,715.52/x
3. Step 3: Cross multiply
   31,143.04x = 42,978.62 × 17,715.52
4. Step 4: Simplify right side
   31,143.04x = 761,388,602.18
5. Step 5: Solve for x
   x = 761,388,602.18/31,143.04
6. Step 6: Final answer
   x = 24,448.11