Finding the Fourth Proportional to 2,223.50, 3,068.74 and 1,279.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.50 : 3,068.74 = 1,279.28 : x
2. Step 2: Convert to fraction form
   2,223.50/3,068.74 = 1,279.28/x
3. Step 3: Cross multiply
   2,223.50x = 3,068.74 × 1,279.28
4. Step 4: Simplify right side
   2,223.50x = 3,925,767.92
5. Step 5: Solve for x
   x = 3,925,767.92/2,223.50
6. Step 6: Final answer
   x = 1,765.58