Finding the Fourth Proportional to 2,223.76, 3,068.74 and 1,215.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.76 : 3,068.74 = 1,215.43 : x
2. Step 2: Convert to fraction form
   2,223.76/3,068.74 = 1,215.43/x
3. Step 3: Cross multiply
   2,223.76x = 3,068.74 × 1,215.43
4. Step 4: Simplify right side
   2,223.76x = 3,729,838.66
5. Step 5: Solve for x
   x = 3,729,838.66/2,223.76
6. Step 6: Final answer
   x = 1,677.27