Finding the Fourth Proportional to 8,889.64, 12,268.16 and 4,910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,889.64 : 12,268.16 = 4,910.72 : x
2. Step 2: Convert to fraction form
   8,889.64/12,268.16 = 4,910.72/x
3. Step 3: Cross multiply
   8,889.64x = 12,268.16 × 4,910.72
4. Step 4: Simplify right side
   8,889.64x = 60,245,498.68
5. Step 5: Solve for x
   x = 60,245,498.68/8,889.64
6. Step 6: Final answer
   x = 6,777.05