Finding the Fourth Proportional to 2,072.74, 3,108.03 and 976.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.74 : 3,108.03 = 976.78 : x
2. Step 2: Convert to fraction form
   2,072.74/3,108.03 = 976.78/x
3. Step 3: Cross multiply
   2,072.74x = 3,108.03 × 976.78
4. Step 4: Simplify right side
   2,072.74x = 3,035,861.54
5. Step 5: Solve for x
   x = 3,035,861.54/2,072.74
6. Step 6: Final answer
   x = 1,464.66