Finding the Fourth Proportional to 1,311.56, 1,968.00 and 726.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.56 : 1,968.00 = 726.57 : x
2. Step 2: Convert to fraction form
   1,311.56/1,968.00 = 726.57/x
3. Step 3: Cross multiply
   1,311.56x = 1,968.00 × 726.57
4. Step 4: Simplify right side
   1,311.56x = 1,429,887.04
5. Step 5: Solve for x
   x = 1,429,887.04/1,311.56
6. Step 6: Final answer
   x = 1,090.22