Finding the Fourth Proportional to 1,039.76, 1,559.52 and 484.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.76 : 1,559.52 = 484.12 : x
2. Step 2: Convert to fraction form
   1,039.76/1,559.52 = 484.12/x
3. Step 3: Cross multiply
   1,039.76x = 1,559.52 × 484.12
4. Step 4: Simplify right side
   1,039.76x = 754,994.82
5. Step 5: Solve for x
   x = 754,994.82/1,039.76
6. Step 6: Final answer
   x = 726.12