Finding the Fourth Proportional to 10,499.73, 14,464.27 and 8,821.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.73 : 14,464.27 = 8,821.20 : x
2. Step 2: Convert to fraction form
   10,499.73/14,464.27 = 8,821.20/x
3. Step 3: Cross multiply
   10,499.73x = 14,464.27 × 8,821.20
4. Step 4: Simplify right side
   10,499.73x = 127,592,283.79
5. Step 5: Solve for x
   x = 127,592,283.79/10,499.73
6. Step 6: Final answer
   x = 12,151.96