Finding the Fourth Proportional to 1,359.32, 2,039.57 and 742.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.32 : 2,039.57 = 742.28 : x
2. Step 2: Convert to fraction form
   1,359.32/2,039.57 = 742.28/x
3. Step 3: Cross multiply
   1,359.32x = 2,039.57 × 742.28
4. Step 4: Simplify right side
   1,359.32x = 1,513,928.31
5. Step 5: Solve for x
   x = 1,513,928.31/1,359.32
6. Step 6: Final answer
   x = 1,113.74