Finding the Fourth Proportional to 9,105.57, 13,645.53 and 7,248.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.57 : 13,645.53 = 7,248.42 : x
2. Step 2: Convert to fraction form
   9,105.57/13,645.53 = 7,248.42/x
3. Step 3: Cross multiply
   9,105.57x = 13,645.53 × 7,248.42
4. Step 4: Simplify right side
   9,105.57x = 98,908,532.56
5. Step 5: Solve for x
   x = 98,908,532.56/9,105.57
6. Step 6: Final answer
   x = 10,862.42