Finding the Fourth Proportional to 31,145.42, 42,979.05 and 16,998.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.42 : 42,979.05 = 16,998.02 : x
2. Step 2: Convert to fraction form
   31,145.42/42,979.05 = 16,998.02/x
3. Step 3: Cross multiply
   31,145.42x = 42,979.05 × 16,998.02
4. Step 4: Simplify right side
   31,145.42x = 730,558,751.48
5. Step 5: Solve for x
   x = 730,558,751.48/31,145.42
6. Step 6: Final answer
   x = 23,456.38