Finding the Fourth Proportional to 31,145.34, 42,979.93 and 16,998.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.34 : 42,979.93 = 16,998.18 : x
2. Step 2: Convert to fraction form
   31,145.34/42,979.93 = 16,998.18/x
3. Step 3: Cross multiply
   31,145.34x = 42,979.93 × 16,998.18
4. Step 4: Simplify right side
   31,145.34x = 730,580,586.53
5. Step 5: Solve for x
   x = 730,580,586.53/31,145.34
6. Step 6: Final answer
   x = 23,457.14