Finding the Fourth Proportional to 1,727.72, 2,378.42 and 1,561.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.72 : 2,378.42 = 1,561.44 : x
2. Step 2: Convert to fraction form
   1,727.72/2,378.42 = 1,561.44/x
3. Step 3: Cross multiply
   1,727.72x = 2,378.42 × 1,561.44
4. Step 4: Simplify right side
   1,727.72x = 3,713,760.12
5. Step 5: Solve for x
   x = 3,713,760.12/1,727.72
6. Step 6: Final answer
   x = 2,149.52