Finding the Fourth Proportional to 8,870.74, 12,241.38 and 4,891.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.74 : 12,241.38 = 4,891.78 : x
2. Step 2: Convert to fraction form
   8,870.74/12,241.38 = 4,891.78/x
3. Step 3: Cross multiply
   8,870.74x = 12,241.38 × 4,891.78
4. Step 4: Simplify right side
   8,870.74x = 59,882,137.86
5. Step 5: Solve for x
   x = 59,882,137.86/8,870.74
6. Step 6: Final answer
   x = 6,750.52