Finding the Fourth Proportional to 2,218.01, 3,060.83 and 1,223.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.01 : 3,060.83 = 1,223.25 : x
2. Step 2: Convert to fraction form
   2,218.01/3,060.83 = 1,223.25/x
3. Step 3: Cross multiply
   2,218.01x = 3,060.83 × 1,223.25
4. Step 4: Simplify right side
   2,218.01x = 3,744,154.18
5. Step 5: Solve for x
   x = 3,744,154.18/2,218.01
6. Step 6: Final answer
   x = 1,688.07