Finding the Fourth Proportional to 13,413.52, 18,511.59 and 7,750.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,413.52 : 18,511.59 = 7,750.18 : x
2. Step 2: Convert to fraction form
   13,413.52/18,511.59 = 7,750.18/x
3. Step 3: Cross multiply
   13,413.52x = 18,511.59 × 7,750.18
4. Step 4: Simplify right side
   13,413.52x = 143,468,154.59
5. Step 5: Solve for x
   x = 143,468,154.59/13,413.52
6. Step 6: Final answer
   x = 10,695.79