Finding the Fourth Proportional to 1,016.57, 1,522.58 and 620.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.57 : 1,522.58 = 620.18 : x
2. Step 2: Convert to fraction form
   1,016.57/1,522.58 = 620.18/x
3. Step 3: Cross multiply
   1,016.57x = 1,522.58 × 620.18
4. Step 4: Simplify right side
   1,016.57x = 944,262.95
5. Step 5: Solve for x
   x = 944,262.95/1,016.57
6. Step 6: Final answer
   x = 928.87