Finding the Fourth Proportional to 10,328.78, 14,253.33 and 5,612.90

Step by Step Solution

1. Step 1: Write the proportion equation
   10,328.78 : 14,253.33 = 5,612.90 : x
2. Step 2: Convert to fraction form
   10,328.78/14,253.33 = 5,612.90/x
3. Step 3: Cross multiply
   10,328.78x = 14,253.33 × 5,612.90
4. Step 4: Simplify right side
   10,328.78x = 80,002,515.96
5. Step 5: Solve for x
   x = 80,002,515.96/10,328.78
6. Step 6: Final answer
   x = 7,745.59