Finding the Fourth Proportional to 13,150, 18,147.72 and 7,561.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150 : 18,147.72 = 7,561.36 : x
2. Step 2: Convert to fraction form
   13,150/18,147.72 = 7,561.36/x
3. Step 3: Cross multiply
   13,150x = 18,147.72 × 7,561.36
4. Step 4: Simplify right side
   13,150x = 137,221,444.10
5. Step 5: Solve for x
   x = 137,221,444.10/13,150
6. Step 6: Final answer
   x = 10,435.09