Finding the Fourth Proportional to 9,889.76, 13,647.69 and 5,413.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,889.76 : 13,647.69 = 5,413.43 : x
2. Step 2: Convert to fraction form
   9,889.76/13,647.69 = 5,413.43/x
3. Step 3: Cross multiply
   9,889.76x = 13,647.69 × 5,413.43
4. Step 4: Simplify right side
   9,889.76x = 73,880,848.60
5. Step 5: Solve for x
   x = 73,880,848.60/9,889.76
6. Step 6: Final answer
   x = 7,470.44