Finding the Fourth Proportional to 3,082.72, 4,624.89 and 891.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,082.72 : 4,624.89 = 891.64 : x
2. Step 2: Convert to fraction form
   3,082.72/4,624.89 = 891.64/x
3. Step 3: Cross multiply
   3,082.72x = 4,624.89 × 891.64
4. Step 4: Simplify right side
   3,082.72x = 4,123,736.92
5. Step 5: Solve for x
   x = 4,123,736.92/3,082.72
6. Step 6: Final answer
   x = 1,337.69