Finding the Fourth Proportional to 9,105.40, 12,562.34 and 5,521.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.40 : 12,562.34 = 5,521.48 : x
2. Step 2: Convert to fraction form
   9,105.40/12,562.34 = 5,521.48/x
3. Step 3: Cross multiply
   9,105.40x = 12,562.34 × 5,521.48
4. Step 4: Simplify right side
   9,105.40x = 69,362,709.06
5. Step 5: Solve for x
   x = 69,362,709.06/9,105.40
6. Step 6: Final answer
   x = 7,617.76