Finding the Fourth Proportional to 3,787.29, 5,681.61 and 1,321.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,787.29 : 5,681.61 = 1,321.38 : x
2. Step 2: Convert to fraction form
   3,787.29/5,681.61 = 1,321.38/x
3. Step 3: Cross multiply
   3,787.29x = 5,681.61 × 1,321.38
4. Step 4: Simplify right side
   3,787.29x = 7,507,565.82
5. Step 5: Solve for x
   x = 7,507,565.82/3,787.29
6. Step 6: Final answer
   x = 1,982.31