Finding the Fourth Proportional to 3,757.05, 5,631.82 and 1,290.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,757.05 : 5,631.82 = 1,290.20 : x
2. Step 2: Convert to fraction form
   3,757.05/5,631.82 = 1,290.20/x
3. Step 3: Cross multiply
   3,757.05x = 5,631.82 × 1,290.20
4. Step 4: Simplify right side
   3,757.05x = 7,266,142.78
5. Step 5: Solve for x
   x = 7,266,142.78/3,757.05
6. Step 6: Final answer
   x = 1,934.00