Finding the Fourth Proportional to 2,216.59, 3,318.73 and 1,117.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.59 : 3,318.73 = 1,117.62 : x
2. Step 2: Convert to fraction form
   2,216.59/3,318.73 = 1,117.62/x
3. Step 3: Cross multiply
   2,216.59x = 3,318.73 × 1,117.62
4. Step 4: Simplify right side
   2,216.59x = 3,709,076.23
5. Step 5: Solve for x
   x = 3,709,076.23/2,216.59
6. Step 6: Final answer
   x = 1,673.33