Finding the Fourth Proportional to 31,156.10, 42,995.50 and 17,009.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.10 : 42,995.50 = 17,009.18 : x
2. Step 2: Convert to fraction form
   31,156.10/42,995.50 = 17,009.18/x
3. Step 3: Cross multiply
   31,156.10x = 42,995.50 × 17,009.18
4. Step 4: Simplify right side
   31,156.10x = 731,318,198.69
5. Step 5: Solve for x
   x = 731,318,198.69/31,156.10
6. Step 6: Final answer
   x = 23,472.71