Finding the Fourth Proportional to 31,143.39, 42,978.11 and 16,995.93

Step by Step Solution

1. Step 1: Write the proportion equation
   31,143.39 : 42,978.11 = 16,995.93 : x
2. Step 2: Convert to fraction form
   31,143.39/42,978.11 = 16,995.93/x
3. Step 3: Cross multiply
   31,143.39x = 42,978.11 × 16,995.93
4. Step 4: Simplify right side
   31,143.39x = 730,452,864.11
5. Step 5: Solve for x
   x = 730,452,864.11/31,143.39
6. Step 6: Final answer
   x = 23,454.51