Finding the Fourth Proportional to 10,449.86, 14,439.87 and 7,612.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,449.86 : 14,439.87 = 7,612.28 : x
2. Step 2: Convert to fraction form
   10,449.86/14,439.87 = 7,612.28/x
3. Step 3: Cross multiply
   10,449.86x = 14,439.87 × 7,612.28
4. Step 4: Simplify right side
   10,449.86x = 109,920,315.55
5. Step 5: Solve for x
   x = 109,920,315.55/10,449.86
6. Step 6: Final answer
   x = 10,518.83