Finding the Fourth Proportional to 9,154.88, 12,628.56 and 5,616.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,154.88 : 12,628.56 = 5,616.80 : x
2. Step 2: Convert to fraction form
   9,154.88/12,628.56 = 5,616.80/x
3. Step 3: Cross multiply
   9,154.88x = 12,628.56 × 5,616.80
4. Step 4: Simplify right side
   9,154.88x = 70,932,095.81
5. Step 5: Solve for x
   x = 70,932,095.81/9,154.88
6. Step 6: Final answer
   x = 7,748.01