Finding the Fourth Proportional to 8,888.72, 12,266.58 and 4,910.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,888.72 : 12,266.58 = 4,910.21 : x
2. Step 2: Convert to fraction form
   8,888.72/12,266.58 = 4,910.21/x
3. Step 3: Cross multiply
   8,888.72x = 12,266.58 × 4,910.21
4. Step 4: Simplify right side
   8,888.72x = 60,231,422.45
5. Step 5: Solve for x
   x = 60,231,422.45/8,888.72
6. Step 6: Final answer
   x = 6,776.17