Finding the Fourth Proportional to 2,072.72, 3,110.16 and 977.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.72 : 3,110.16 = 977.16 : x
2. Step 2: Convert to fraction form
   2,072.72/3,110.16 = 977.16/x
3. Step 3: Cross multiply
   2,072.72x = 3,110.16 × 977.16
4. Step 4: Simplify right side
   2,072.72x = 3,039,123.95
5. Step 5: Solve for x
   x = 3,039,123.95/2,072.72
6. Step 6: Final answer
   x = 1,466.25