Finding the Fourth Proportional to 1,728.71, 2,594.15 and 907.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.71 : 2,594.15 = 907.57 : x
2. Step 2: Convert to fraction form
   1,728.71/2,594.15 = 907.57/x
3. Step 3: Cross multiply
   1,728.71x = 2,594.15 × 907.57
4. Step 4: Simplify right side
   1,728.71x = 2,354,372.72
5. Step 5: Solve for x
   x = 2,354,372.72/1,728.71
6. Step 6: Final answer
   x = 1,361.92