Finding the Fourth Proportional to 1,766.72, 2,438.01 and 980.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.72 : 2,438.01 = 980.79 : x
2. Step 2: Convert to fraction form
   1,766.72/2,438.01 = 980.79/x
3. Step 3: Cross multiply
   1,766.72x = 2,438.01 × 980.79
4. Step 4: Simplify right side
   1,766.72x = 2,391,175.83
5. Step 5: Solve for x
   x = 2,391,175.83/1,766.72
6. Step 6: Final answer
   x = 1,353.46