Finding the Fourth Proportional to 8,870.40, 12,241.17 and 4,891.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.40 : 12,241.17 = 4,891.68 : x
2. Step 2: Convert to fraction form
   8,870.40/12,241.17 = 4,891.68/x
3. Step 3: Cross multiply
   8,870.40x = 12,241.17 × 4,891.68
4. Step 4: Simplify right side
   8,870.40x = 59,879,886.47
5. Step 5: Solve for x
   x = 59,879,886.47/8,870.40
6. Step 6: Final answer
   x = 6,750.53