Finding the Fourth Proportional to 31,145.70, 42,979.37 and 16,998.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.70 : 42,979.37 = 16,998.24 : x
2. Step 2: Convert to fraction form
   31,145.70/42,979.37 = 16,998.24/x
3. Step 3: Cross multiply
   31,145.70x = 42,979.37 × 16,998.24
4. Step 4: Simplify right side
   31,145.70x = 730,573,561.32
5. Step 5: Solve for x
   x = 730,573,561.32/31,145.70
6. Step 6: Final answer
   x = 23,456.64