Finding the Fourth Proportional to 10,785.28, 14,885.12 and 7,998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,785.28 : 14,885.12 = 7,998.72 : x
2. Step 2: Convert to fraction form
   10,785.28/14,885.12 = 7,998.72/x
3. Step 3: Cross multiply
   10,785.28x = 14,885.12 × 7,998.72
4. Step 4: Simplify right side
   10,785.28x = 119,061,907.05
5. Step 5: Solve for x
   x = 119,061,907.05/10,785.28
6. Step 6: Final answer
   x = 11,039.30