Finding the Fourth Proportional to 9,890.01, 13,647.88 and 5,413.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.01 : 13,647.88 = 5,413.67 : x
2. Step 2: Convert to fraction form
   9,890.01/13,647.88 = 5,413.67/x
3. Step 3: Cross multiply
   9,890.01x = 13,647.88 × 5,413.67
4. Step 4: Simplify right side
   9,890.01x = 73,885,118.52
5. Step 5: Solve for x
   x = 73,885,118.52/9,890.01
6. Step 6: Final answer
   x = 7,470.68