Finding the Fourth Proportional to 9,987.57, 14,980.68 and 3,413.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.57 : 14,980.68 = 3,413.61 : x
2. Step 2: Convert to fraction form
   9,987.57/14,980.68 = 3,413.61/x
3. Step 3: Cross multiply
   9,987.57x = 14,980.68 × 3,413.61
4. Step 4: Simplify right side
   9,987.57x = 51,138,199.05
5. Step 5: Solve for x
   x = 51,138,199.05/9,987.57
6. Step 6: Final answer
   x = 5,120.18