Finding the Fourth Proportional to 8,900.09, 12,282.02 and 4,921.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,900.09 : 12,282.02 = 4,921.28 : x
2. Step 2: Convert to fraction form
   8,900.09/12,282.02 = 4,921.28/x
3. Step 3: Cross multiply
   8,900.09x = 12,282.02 × 4,921.28
4. Step 4: Simplify right side
   8,900.09x = 60,443,234.78
5. Step 5: Solve for x
   x = 60,443,234.78/8,900.09
6. Step 6: Final answer
   x = 6,791.31