Finding the Fourth Proportional to 8,889.50, 12,268.31 and 4,911.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,889.50 : 12,268.31 = 4,911.89 : x
2. Step 2: Convert to fraction form
   8,889.50/12,268.31 = 4,911.89/x
3. Step 3: Cross multiply
   8,889.50x = 12,268.31 × 4,911.89
4. Step 4: Simplify right side
   8,889.50x = 60,260,599.94
5. Step 5: Solve for x
   x = 60,260,599.94/8,889.50
6. Step 6: Final answer
   x = 6,778.85