Finding the Fourth Proportional to 3,985.23, 5,499.60 and 2,216.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.23 : 5,499.60 = 2,216.84 : x
2. Step 2: Convert to fraction form
   3,985.23/5,499.60 = 2,216.84/x
3. Step 3: Cross multiply
   3,985.23x = 5,499.60 × 2,216.84
4. Step 4: Simplify right side
   3,985.23x = 12,191,711.31
5. Step 5: Solve for x
   x = 12,191,711.31/3,985.23
6. Step 6: Final answer
   x = 3,059.22