Finding the Fourth Proportional to 3,985.17, 5,499.50 and 2,216.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.17 : 5,499.50 = 2,216.75 : x
2. Step 2: Convert to fraction form
   3,985.17/5,499.50 = 2,216.75/x
3. Step 3: Cross multiply
   3,985.17x = 5,499.50 × 2,216.75
4. Step 4: Simplify right side
   3,985.17x = 12,190,978.04
5. Step 5: Solve for x
   x = 12,190,978.04/3,985.17
6. Step 6: Final answer
   x = 3,059.09