Finding the Fourth Proportional to 8,856.61, 12,222.48 and 4,878.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,856.61 : 12,222.48 = 4,878.10 : x
2. Step 2: Convert to fraction form
   8,856.61/12,222.48 = 4,878.10/x
3. Step 3: Cross multiply
   8,856.61x = 12,222.48 × 4,878.10
4. Step 4: Simplify right side
   8,856.61x = 59,622,479.69
5. Step 5: Solve for x
   x = 59,622,479.69/8,856.61
6. Step 6: Final answer
   x = 6,731.98