Finding the Fourth Proportional to 31,638.74, 43,661.71 and 17,298.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,638.74 : 43,661.71 = 17,298.85 : x
2. Step 2: Convert to fraction form
   31,638.74/43,661.71 = 17,298.85/x
3. Step 3: Cross multiply
   31,638.74x = 43,661.71 × 17,298.85
4. Step 4: Simplify right side
   31,638.74x = 755,297,501.91
5. Step 5: Solve for x
   x = 755,297,501.91/31,638.74
6. Step 6: Final answer
   x = 23,872.55