Finding the Fourth Proportional to 1,145.03, 1,579.56 and 724.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.03 : 1,579.56 = 724.68 : x
2. Step 2: Convert to fraction form
   1,145.03/1,579.56 = 724.68/x
3. Step 3: Cross multiply
   1,145.03x = 1,579.56 × 724.68
4. Step 4: Simplify right side
   1,145.03x = 1,144,667.64
5. Step 5: Solve for x
   x = 1,144,667.64/1,145.03
6. Step 6: Final answer
   x = 999.68