Finding the Fourth Proportional to 10,878.89, 16,315.39 and 2,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,878.89 : 16,315.39 = 2,979.50 : x
2. Step 2: Convert to fraction form
   10,878.89/16,315.39 = 2,979.50/x
3. Step 3: Cross multiply
   10,878.89x = 16,315.39 × 2,979.50
4. Step 4: Simplify right side
   10,878.89x = 48,611,765.48
5. Step 5: Solve for x
   x = 48,611,765.48/10,878.89
6. Step 6: Final answer
   x = 4,468.45