Finding the Fourth Proportional to 8,870.84, 12,241.86 and 4,891.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.84 : 12,241.86 = 4,891.76 : x
2. Step 2: Convert to fraction form
   8,870.84/12,241.86 = 4,891.76/x
3. Step 3: Cross multiply
   8,870.84x = 12,241.86 × 4,891.76
4. Step 4: Simplify right side
   8,870.84x = 59,884,241.07
5. Step 5: Solve for x
   x = 59,884,241.07/8,870.84
6. Step 6: Final answer
   x = 6,750.68