Finding the Fourth Proportional to 13,610.27, 18,781.69 and 7,642.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,610.27 : 18,781.69 = 7,642.19 : x
2. Step 2: Convert to fraction form
   13,610.27/18,781.69 = 7,642.19/x
3. Step 3: Cross multiply
   13,610.27x = 18,781.69 × 7,642.19
4. Step 4: Simplify right side
   13,610.27x = 143,533,243.50
5. Step 5: Solve for x
   x = 143,533,243.50/13,610.27
6. Step 6: Final answer
   x = 10,545.95