Finding the Fourth Proportional to 25,830.50, 35,648.71 and 15,223.55

Step by Step Solution

1. Step 1: Write the proportion equation
   25,830.50 : 35,648.71 = 15,223.55 : x
2. Step 2: Convert to fraction form
   25,830.50/35,648.71 = 15,223.55/x
3. Step 3: Cross multiply
   25,830.50x = 35,648.71 × 15,223.55
4. Step 4: Simplify right side
   25,830.50x = 542,699,702.82
5. Step 5: Solve for x
   x = 542,699,702.82/25,830.50
6. Step 6: Final answer
   x = 21,010.04