Finding the Fourth Proportional to 2,218.02, 3,060.79 and 1,223.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.02 : 3,060.79 = 1,223.26 : x
2. Step 2: Convert to fraction form
   2,218.02/3,060.79 = 1,223.26/x
3. Step 3: Cross multiply
   2,218.02x = 3,060.79 × 1,223.26
4. Step 4: Simplify right side
   2,218.02x = 3,744,141.98
5. Step 5: Solve for x
   x = 3,744,141.98/2,218.02
6. Step 6: Final answer
   x = 1,688.06