Finding the Fourth Proportional to 10,985.39, 16,480.20 and 3,587.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.39 : 16,480.20 = 3,587.86 : x
2. Step 2: Convert to fraction form
   10,985.39/16,480.20 = 3,587.86/x
3. Step 3: Cross multiply
   10,985.39x = 16,480.20 × 3,587.86
4. Step 4: Simplify right side
   10,985.39x = 59,128,567.97
5. Step 5: Solve for x
   x = 59,128,567.97/10,985.39
6. Step 6: Final answer
   x = 5,382.48