Finding the Fourth Proportional to 2,687.86, 3,706.42 and 2,127.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.86 : 3,706.42 = 2,127.43 : x
2. Step 2: Convert to fraction form
   2,687.86/3,706.42 = 2,127.43/x
3. Step 3: Cross multiply
   2,687.86x = 3,706.42 × 2,127.43
4. Step 4: Simplify right side
   2,687.86x = 7,885,149.10
5. Step 5: Solve for x
   x = 7,885,149.10/2,687.86
6. Step 6: Final answer
   x = 2,933.62