Finding the Fourth Proportional to 9,889.84, 13,647.96 and 5,413.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,889.84 : 13,647.96 = 5,413.56 : x
2. Step 2: Convert to fraction form
   9,889.84/13,647.96 = 5,413.56/x
3. Step 3: Cross multiply
   9,889.84x = 13,647.96 × 5,413.56
4. Step 4: Simplify right side
   9,889.84x = 73,884,050.34
5. Step 5: Solve for x
   x = 73,884,050.34/9,889.84
6. Step 6: Final answer
   x = 7,470.70