Finding the Fourth Proportional to 31,156.76, 42,995.12 and 17,009.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.76 : 42,995.12 = 17,009.72 : x
2. Step 2: Convert to fraction form
   31,156.76/42,995.12 = 17,009.72/x
3. Step 3: Cross multiply
   31,156.76x = 42,995.12 × 17,009.72
4. Step 4: Simplify right side
   31,156.76x = 731,334,867.52
5. Step 5: Solve for x
   x = 731,334,867.52/31,156.76
6. Step 6: Final answer
   x = 23,472.75