Finding the Fourth Proportional to 13,610.46, 18,781.83 and 7,642.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,610.46 : 18,781.83 = 7,642.02 : x
2. Step 2: Convert to fraction form
   13,610.46/18,781.83 = 7,642.02/x
3. Step 3: Cross multiply
   13,610.46x = 18,781.83 × 7,642.02
4. Step 4: Simplify right side
   13,610.46x = 143,531,120.50
5. Step 5: Solve for x
   x = 143,531,120.50/13,610.46
6. Step 6: Final answer
   x = 10,545.65