Finding the Fourth Proportional to 21,643.83, 32,466.67 and 8,499.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,643.83 : 32,466.67 = 8,499.05 : x
2. Step 2: Convert to fraction form
   21,643.83/32,466.67 = 8,499.05/x
3. Step 3: Cross multiply
   21,643.83x = 32,466.67 × 8,499.05
4. Step 4: Simplify right side
   21,643.83x = 275,935,851.66
5. Step 5: Solve for x
   x = 275,935,851.66/21,643.83
6. Step 6: Final answer
   x = 12,748.94