Finding the Fourth Proportional to 9,143.28, 12,619.80 and 5,561.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.28 : 12,619.80 = 5,561.46 : x
2. Step 2: Convert to fraction form
   9,143.28/12,619.80 = 5,561.46/x
3. Step 3: Cross multiply
   9,143.28x = 12,619.80 × 5,561.46
4. Step 4: Simplify right side
   9,143.28x = 70,184,512.91
5. Step 5: Solve for x
   x = 70,184,512.91/9,143.28
6. Step 6: Final answer
   x = 7,676.08