Finding the Fourth Proportional to 1,731.68, 2,389.71 and 945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,731.68 : 2,389.71 = 945.72 : x
2. Step 2: Convert to fraction form
   1,731.68/2,389.71 = 945.72/x
3. Step 3: Cross multiply
   1,731.68x = 2,389.71 × 945.72
4. Step 4: Simplify right side
   1,731.68x = 2,259,996.54
5. Step 5: Solve for x
   x = 2,259,996.54/1,731.68
6. Step 6: Final answer
   x = 1,305.09