Finding the Fourth Proportional to 31,158.06, 42,998.31 and 17,011.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,158.06 : 42,998.31 = 17,011.05 : x
2. Step 2: Convert to fraction form
   31,158.06/42,998.31 = 17,011.05/x
3. Step 3: Cross multiply
   31,158.06x = 42,998.31 × 17,011.05
4. Step 4: Simplify right side
   31,158.06x = 731,446,401.33
5. Step 5: Solve for x
   x = 731,446,401.33/31,158.06
6. Step 6: Final answer
   x = 23,475.35