Finding the Fourth Proportional to 3,985.35, 5,477.27 and 3,099.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.35 : 5,477.27 = 3,099.61 : x
2. Step 2: Convert to fraction form
   3,985.35/5,477.27 = 3,099.61/x
3. Step 3: Cross multiply
   3,985.35x = 5,477.27 × 3,099.61
4. Step 4: Simplify right side
   3,985.35x = 16,977,400.86
5. Step 5: Solve for x
   x = 16,977,400.86/3,985.35
6. Step 6: Final answer
   x = 4,259.95