Finding the Fourth Proportional to 31,462.72, 43,420.34 and 18,036.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,462.72 : 43,420.34 = 18,036.20 : x
2. Step 2: Convert to fraction form
   31,462.72/43,420.34 = 18,036.20/x
3. Step 3: Cross multiply
   31,462.72x = 43,420.34 × 18,036.20
4. Step 4: Simplify right side
   31,462.72x = 783,137,936.31
5. Step 5: Solve for x
   x = 783,137,936.31/31,462.72
6. Step 6: Final answer
   x = 24,890.98