Finding the Fourth Proportional to 31,156.31, 42,995.89 and 17,009.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.31 : 42,995.89 = 17,009.30 : x
2. Step 2: Convert to fraction form
   31,156.31/42,995.89 = 17,009.30/x
3. Step 3: Cross multiply
   31,156.31x = 42,995.89 × 17,009.30
4. Step 4: Simplify right side
   31,156.31x = 731,330,120.53
5. Step 5: Solve for x
   x = 731,330,120.53/31,156.31
6. Step 6: Final answer
   x = 23,472.94