Finding the Fourth Proportional to 11,153.71, 15,389.60 and 7,569.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,153.71 : 15,389.60 = 7,569.16 : x
2. Step 2: Convert to fraction form
   11,153.71/15,389.60 = 7,569.16/x
3. Step 3: Cross multiply
   11,153.71x = 15,389.60 × 7,569.16
4. Step 4: Simplify right side
   11,153.71x = 116,486,268.42
5. Step 5: Solve for x
   x = 116,486,268.42/11,153.71
6. Step 6: Final answer
   x = 10,443.72