Finding the Fourth Proportional to 1,375.56, 2,064.78 and 726.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.56 : 2,064.78 = 726.48 : x
2. Step 2: Convert to fraction form
   1,375.56/2,064.78 = 726.48/x
3. Step 3: Cross multiply
   1,375.56x = 2,064.78 × 726.48
4. Step 4: Simplify right side
   1,375.56x = 1,500,021.37
5. Step 5: Solve for x
   x = 1,500,021.37/1,375.56
6. Step 6: Final answer
   x = 1,090.48