Finding the Fourth Proportional to 1,731.72, 2,389.47 and 1,644.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,731.72 : 2,389.47 = 1,644.15 : x
2. Step 2: Convert to fraction form
   1,731.72/2,389.47 = 1,644.15/x
3. Step 3: Cross multiply
   1,731.72x = 2,389.47 × 1,644.15
4. Step 4: Simplify right side
   1,731.72x = 3,928,647.10
5. Step 5: Solve for x
   x = 3,928,647.10/1,731.72
6. Step 6: Final answer
   x = 2,268.64