Finding the Fourth Proportional to 9,161.48, 12,646.10 and 5,574.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,161.48 : 12,646.10 = 5,574.80 : x
2. Step 2: Convert to fraction form
   9,161.48/12,646.10 = 5,574.80/x
3. Step 3: Cross multiply
   9,161.48x = 12,646.10 × 5,574.80
4. Step 4: Simplify right side
   9,161.48x = 70,499,482.02
5. Step 5: Solve for x
   x = 70,499,482.02/9,161.48
6. Step 6: Final answer
   x = 7,695.20