Finding the Fourth Proportional to 1,062.91, 1,466.31 and 620.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.91 : 1,466.31 = 620.55 : x
2. Step 2: Convert to fraction form
   1,062.91/1,466.31 = 620.55/x
3. Step 3: Cross multiply
   1,062.91x = 1,466.31 × 620.55
4. Step 4: Simplify right side
   1,062.91x = 909,918.67
5. Step 5: Solve for x
   x = 909,918.67/1,062.91
6. Step 6: Final answer
   x = 856.06