Finding the Fourth Proportional to 1,019.96, 1,528.34 and 744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.96 : 1,528.34 = 744.78 : x
2. Step 2: Convert to fraction form
   1,019.96/1,528.34 = 744.78/x
3. Step 3: Cross multiply
   1,019.96x = 1,528.34 × 744.78
4. Step 4: Simplify right side
   1,019.96x = 1,138,273.34
5. Step 5: Solve for x
   x = 1,138,273.34/1,019.96
6. Step 6: Final answer
   x = 1,116.00