Finding the Fourth Proportional to 1,062.78, 1,466.58 and 620.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.78 : 1,466.58 = 620.82 : x
2. Step 2: Convert to fraction form
   1,062.78/1,466.58 = 620.82/x
3. Step 3: Cross multiply
   1,062.78x = 1,466.58 × 620.82
4. Step 4: Simplify right side
   1,062.78x = 910,482.20
5. Step 5: Solve for x
   x = 910,482.20/1,062.78
6. Step 6: Final answer
   x = 856.70