Finding the Fourth Proportional to 1,014.56, 1,521.49 and 398.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.56 : 1,521.49 = 398.10 : x
2. Step 2: Convert to fraction form
   1,014.56/1,521.49 = 398.10/x
3. Step 3: Cross multiply
   1,014.56x = 1,521.49 × 398.10
4. Step 4: Simplify right side
   1,014.56x = 605,705.17
5. Step 5: Solve for x
   x = 605,705.17/1,014.56
6. Step 6: Final answer
   x = 597.01