Finding the Fourth Proportional to 14,066.55, 21,089.37 and 8,518.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,066.55 : 21,089.37 = 8,518.59 : x
2. Step 2: Convert to fraction form
   14,066.55/21,089.37 = 8,518.59/x
3. Step 3: Cross multiply
   14,066.55x = 21,089.37 × 8,518.59
4. Step 4: Simplify right side
   14,066.55x = 179,651,696.39
5. Step 5: Solve for x
   x = 179,651,696.39/14,066.55
6. Step 6: Final answer
   x = 12,771.55