Finding the Fourth Proportional to 3,669.62, 5,064.03 and 1,991

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.62 : 5,064.03 = 1,991 : x
2. Step 2: Convert to fraction form
   3,669.62/5,064.03 = 1,991/x
3. Step 3: Cross multiply
   3,669.62x = 5,064.03 × 1,991
4. Step 4: Simplify right side
   3,669.62x = 10,082,483.73
5. Step 5: Solve for x
   x = 10,082,483.73/3,669.62
6. Step 6: Final answer
   x = 2,747.56