Finding the Fourth Proportional to 1,020.24, 1,407.72 and 606.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.24 : 1,407.72 = 606.16 : x
2. Step 2: Convert to fraction form
   1,020.24/1,407.72 = 606.16/x
3. Step 3: Cross multiply
   1,020.24x = 1,407.72 × 606.16
4. Step 4: Simplify right side
   1,020.24x = 853,303.56
5. Step 5: Solve for x
   x = 853,303.56/1,020.24
6. Step 6: Final answer
   x = 836.38