Finding the Fourth Proportional to 21,566.15, 29,759.67 and 12,132.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,566.15 : 29,759.67 = 12,132.89 : x
2. Step 2: Convert to fraction form
   21,566.15/29,759.67 = 12,132.89/x
3. Step 3: Cross multiply
   21,566.15x = 29,759.67 × 12,132.89
4. Step 4: Simplify right side
   21,566.15x = 361,070,802.55
5. Step 5: Solve for x
   x = 361,070,802.55/21,566.15
6. Step 6: Final answer
   x = 16,742.48