Finding the Fourth Proportional to 5,560.21, 7,662.49 and 3,985.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,560.21 : 7,662.49 = 3,985.57 : x
2. Step 2: Convert to fraction form
   5,560.21/7,662.49 = 3,985.57/x
3. Step 3: Cross multiply
   5,560.21x = 7,662.49 × 3,985.57
4. Step 4: Simplify right side
   5,560.21x = 30,539,361.15
5. Step 5: Solve for x
   x = 30,539,361.15/5,560.21
6. Step 6: Final answer
   x = 5,492.49