Finding the Fourth Proportional to 2,128.41, 2,935.20 and 1,687.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.41 : 2,935.20 = 1,687.37 : x
2. Step 2: Convert to fraction form
   2,128.41/2,935.20 = 1,687.37/x
3. Step 3: Cross multiply
   2,128.41x = 2,935.20 × 1,687.37
4. Step 4: Simplify right side
   2,128.41x = 4,952,760.08
5. Step 5: Solve for x
   x = 4,952,760.08/2,128.41
6. Step 6: Final answer
   x = 2,326.98