Finding the Fourth Proportional to 1,776.31, 2,451.33 and 979.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.31 : 2,451.33 = 979.67 : x
2. Step 2: Convert to fraction form
   1,776.31/2,451.33 = 979.67/x
3. Step 3: Cross multiply
   1,776.31x = 2,451.33 × 979.67
4. Step 4: Simplify right side
   1,776.31x = 2,401,477.31
5. Step 5: Solve for x
   x = 2,401,477.31/1,776.31
6. Step 6: Final answer
   x = 1,351.95