Finding the Fourth Proportional to 1,688.58, 2,535.42 and 1,377.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.58 : 2,535.42 = 1,377.18 : x
2. Step 2: Convert to fraction form
   1,688.58/2,535.42 = 1,377.18/x
3. Step 3: Cross multiply
   1,688.58x = 2,535.42 × 1,377.18
4. Step 4: Simplify right side
   1,688.58x = 3,491,729.72
5. Step 5: Solve for x
   x = 3,491,729.72/1,688.58
6. Step 6: Final answer
   x = 2,067.85