Finding the Fourth Proportional to 1,098.58, 1,515.83 and 744.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.58 : 1,515.83 = 744.78 : x
2. Step 2: Convert to fraction form
   1,098.58/1,515.83 = 744.78/x
3. Step 3: Cross multiply
   1,098.58x = 1,515.83 × 744.78
4. Step 4: Simplify right side
   1,098.58x = 1,128,966.02
5. Step 5: Solve for x
   x = 1,128,966.02/1,098.58
6. Step 6: Final answer
   x = 1,027.66