Finding the Fourth Proportional to 1,691.72, 2,336.82 and 1,361.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,691.72 : 2,336.82 = 1,361.37 : x
2. Step 2: Convert to fraction form
   1,691.72/2,336.82 = 1,361.37/x
3. Step 3: Cross multiply
   1,691.72x = 2,336.82 × 1,361.37
4. Step 4: Simplify right side
   1,691.72x = 3,181,280.30
5. Step 5: Solve for x
   x = 3,181,280.30/1,691.72
6. Step 6: Final answer
   x = 1,880.50