Finding the Fourth Proportional to 21,665.98, 32,440.30 and 11,255.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.98 : 32,440.30 = 11,255.86 : x
2. Step 2: Convert to fraction form
   21,665.98/32,440.30 = 11,255.86/x
3. Step 3: Cross multiply
   21,665.98x = 32,440.30 × 11,255.86
4. Step 4: Simplify right side
   21,665.98x = 365,143,487.57
5. Step 5: Solve for x
   x = 365,143,487.57/21,665.98
6. Step 6: Final answer
   x = 16,853.31