Finding the Fourth Proportional to 8,870.59, 12,241.33 and 4,891.74

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.59 : 12,241.33 = 4,891.74 : x
2. Step 2: Convert to fraction form
   8,870.59/12,241.33 = 4,891.74/x
3. Step 3: Cross multiply
   8,870.59x = 12,241.33 × 4,891.74
4. Step 4: Simplify right side
   8,870.59x = 59,881,403.61
5. Step 5: Solve for x
   x = 59,881,403.61/8,870.59
6. Step 6: Final answer
   x = 6,750.55