Finding the Fourth Proportional to 21,411, 29,565.42 and 13,466.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,411 : 29,565.42 = 13,466.52 : x
2. Step 2: Convert to fraction form
   21,411/29,565.42 = 13,466.52/x
3. Step 3: Cross multiply
   21,411x = 29,565.42 × 13,466.52
4. Step 4: Simplify right side
   21,411x = 398,143,319.74
5. Step 5: Solve for x
   x = 398,143,319.74/21,411
6. Step 6: Final answer
   x = 18,595.27