Finding the Fourth Proportional to 1,065.18, 1,598.31 and 416.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.18 : 1,598.31 = 416.37 : x
2. Step 2: Convert to fraction form
   1,065.18/1,598.31 = 416.37/x
3. Step 3: Cross multiply
   1,065.18x = 1,598.31 × 416.37
4. Step 4: Simplify right side
   1,065.18x = 665,488.33
5. Step 5: Solve for x
   x = 665,488.33/1,065.18
6. Step 6: Final answer
   x = 624.77