Finding the Fourth Proportional to 31,420.55, 43,360.50 and 17,274.30

Step by Step Solution

1. Step 1: Write the proportion equation
   31,420.55 : 43,360.50 = 17,274.30 : x
2. Step 2: Convert to fraction form
   31,420.55/43,360.50 = 17,274.30/x
3. Step 3: Cross multiply
   31,420.55x = 43,360.50 × 17,274.30
4. Step 4: Simplify right side
   31,420.55x = 749,022,285.15
5. Step 5: Solve for x
   x = 749,022,285.15/31,420.55
6. Step 6: Final answer
   x = 23,838.62