Finding the Fourth Proportional to 1,727.72, 2,384.31 and 1,224.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.72 : 2,384.31 = 1,224.47 : x
2. Step 2: Convert to fraction form
   1,727.72/2,384.31 = 1,224.47/x
3. Step 3: Cross multiply
   1,727.72x = 2,384.31 × 1,224.47
4. Step 4: Simplify right side
   1,727.72x = 2,919,516.07
5. Step 5: Solve for x
   x = 2,919,516.07/1,727.72
6. Step 6: Final answer
   x = 1,689.81