Finding the Fourth Proportional to 3,669.89, 5,064.41 and 1,991.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.89 : 5,064.41 = 1,991.29 : x
2. Step 2: Convert to fraction form
   3,669.89/5,064.41 = 1,991.29/x
3. Step 3: Cross multiply
   3,669.89x = 5,064.41 × 1,991.29
4. Step 4: Simplify right side
   3,669.89x = 10,084,700.88
5. Step 5: Solve for x
   x = 10,084,700.88/3,669.89
6. Step 6: Final answer
   x = 2,747.95