Finding the Fourth Proportional to 10,878.44, 14,999.10 and 9,196.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,878.44 : 14,999.10 = 9,196.88 : x
2. Step 2: Convert to fraction form
   10,878.44/14,999.10 = 9,196.88/x
3. Step 3: Cross multiply
   10,878.44x = 14,999.10 × 9,196.88
4. Step 4: Simplify right side
   10,878.44x = 137,944,847.81
5. Step 5: Solve for x
   x = 137,944,847.81/10,878.44
6. Step 6: Final answer
   x = 12,680.58