Finding the Fourth Proportional to 1,054.32, 1,578.72 and 744.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.32 : 1,578.72 = 744.50 : x
2. Step 2: Convert to fraction form
   1,054.32/1,578.72 = 744.50/x
3. Step 3: Cross multiply
   1,054.32x = 1,578.72 × 744.50
4. Step 4: Simplify right side
   1,054.32x = 1,175,357.04
5. Step 5: Solve for x
   x = 1,175,357.04/1,054.32
6. Step 6: Final answer
   x = 1,114.80