Finding the Fourth Proportional to 8,870.49, 12,241.83 and 4,891.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.49 : 12,241.83 = 4,891.60 : x
2. Step 2: Convert to fraction form
   8,870.49/12,241.83 = 4,891.60/x
3. Step 3: Cross multiply
   8,870.49x = 12,241.83 × 4,891.60
4. Step 4: Simplify right side
   8,870.49x = 59,882,049.96
5. Step 5: Solve for x
   x = 59,882,049.96/8,870.49
6. Step 6: Final answer
   x = 6,750.71