Finding the Fourth Proportional to 31,407.76, 47,118.57 and 17,388.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407.76 : 47,118.57 = 17,388.24 : x
2. Step 2: Convert to fraction form
   31,407.76/47,118.57 = 17,388.24/x
3. Step 3: Cross multiply
   31,407.76x = 47,118.57 × 17,388.24
4. Step 4: Simplify right side
   31,407.76x = 819,309,003.62
5. Step 5: Solve for x
   x = 819,309,003.62/31,407.76
6. Step 6: Final answer
   x = 26,086.20