Finding the Fourth Proportional to 8,899.86, 12,281.16 and 4,921.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,899.86 : 12,281.16 = 4,921.02 : x
2. Step 2: Convert to fraction form
   8,899.86/12,281.16 = 4,921.02/x
3. Step 3: Cross multiply
   8,899.86x = 12,281.16 × 4,921.02
4. Step 4: Simplify right side
   8,899.86x = 60,435,833.98
5. Step 5: Solve for x
   x = 60,435,833.98/8,899.86
6. Step 6: Final answer
   x = 6,790.65