Finding the Fourth Proportional to 1,034.56, 1,427.52 and 620.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.56 : 1,427.52 = 620.56 : x
2. Step 2: Convert to fraction form
   1,034.56/1,427.52 = 620.56/x
3. Step 3: Cross multiply
   1,034.56x = 1,427.52 × 620.56
4. Step 4: Simplify right side
   1,034.56x = 885,861.81
5. Step 5: Solve for x
   x = 885,861.81/1,034.56
6. Step 6: Final answer
   x = 856.27