Finding the Fourth Proportional to 1,813.50, 2,500.56 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   1,813.50 : 2,500.56 = 1,223 : x
2. Step 2: Convert to fraction form
   1,813.50/2,500.56 = 1,223/x
3. Step 3: Cross multiply
   1,813.50x = 2,500.56 × 1,223
4. Step 4: Simplify right side
   1,813.50x = 3,058,184.88
5. Step 5: Solve for x
   x = 3,058,184.88/1,813.50
6. Step 6: Final answer
   x = 1,686.34