Finding the Fourth Proportional to 1,393.20, 2,086.56 and 741.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.20 : 2,086.56 = 741.96 : x
2. Step 2: Convert to fraction form
   1,393.20/2,086.56 = 741.96/x
3. Step 3: Cross multiply
   1,393.20x = 2,086.56 × 741.96
4. Step 4: Simplify right side
   1,393.20x = 1,548,144.06
5. Step 5: Solve for x
   x = 1,548,144.06/1,393.20
6. Step 6: Final answer
   x = 1,111.21