Finding the Fourth Proportional to 2,111.78, 3,168.12 and 726.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.78 : 3,168.12 = 726.14 : x
2. Step 2: Convert to fraction form
   2,111.78/3,168.12 = 726.14/x
3. Step 3: Cross multiply
   2,111.78x = 3,168.12 × 726.14
4. Step 4: Simplify right side
   2,111.78x = 2,300,498.66
5. Step 5: Solve for x
   x = 2,300,498.66/2,111.78
6. Step 6: Final answer
   x = 1,089.36