Finding the Fourth Proportional to 5,637.98, 8,454.31 and 1,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,637.98 : 8,454.31 = 1,687.72 : x
2. Step 2: Convert to fraction form
   5,637.98/8,454.31 = 1,687.72/x
3. Step 3: Cross multiply
   5,637.98x = 8,454.31 × 1,687.72
4. Step 4: Simplify right side
   5,637.98x = 14,268,482.72
5. Step 5: Solve for x
   x = 14,268,482.72/5,637.98
6. Step 6: Final answer
   x = 2,530.78