Finding the Fourth Proportional to 9,151.68, 12,629.52 and 5,612.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.68 : 12,629.52 = 5,612.80 : x
2. Step 2: Convert to fraction form
   9,151.68/12,629.52 = 5,612.80/x
3. Step 3: Cross multiply
   9,151.68x = 12,629.52 × 5,612.80
4. Step 4: Simplify right side
   9,151.68x = 70,886,969.86
5. Step 5: Solve for x
   x = 70,886,969.86/9,151.68
6. Step 6: Final answer
   x = 7,745.79