Finding the Fourth Proportional to 7,082.72, 9,774.16 and 3,938.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,082.72 : 9,774.16 = 3,938.91 : x
2. Step 2: Convert to fraction form
   7,082.72/9,774.16 = 3,938.91/x
3. Step 3: Cross multiply
   7,082.72x = 9,774.16 × 3,938.91
4. Step 4: Simplify right side
   7,082.72x = 38,499,535.47
5. Step 5: Solve for x
   x = 38,499,535.47/7,082.72
6. Step 6: Final answer
   x = 5,435.70