Finding the Fourth Proportional to 1,766.57, 2,438.01 and 1,020.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.57 : 2,438.01 = 1,020.56 : x
2. Step 2: Convert to fraction form
   1,766.57/2,438.01 = 1,020.56/x
3. Step 3: Cross multiply
   1,766.57x = 2,438.01 × 1,020.56
4. Step 4: Simplify right side
   1,766.57x = 2,488,123.30
5. Step 5: Solve for x
   x = 2,488,123.30/1,766.57
6. Step 6: Final answer
   x = 1,408.45