Finding the Fourth Proportional to 17,951.90, 26,986.18 and 17,864.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,951.90 : 26,986.18 = 17,864.42 : x
2. Step 2: Convert to fraction form
   17,951.90/26,986.18 = 17,864.42/x
3. Step 3: Cross multiply
   17,951.90x = 26,986.18 × 17,864.42
4. Step 4: Simplify right side
   17,951.90x = 482,092,453.72
5. Step 5: Solve for x
   x = 482,092,453.72/17,951.90
6. Step 6: Final answer
   x = 26,854.68