Finding the Fourth Proportional to 1,256.18, 1,732.37 and 1,007.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.18 : 1,732.37 = 1,007.51 : x
2. Step 2: Convert to fraction form
   1,256.18/1,732.37 = 1,007.51/x
3. Step 3: Cross multiply
   1,256.18x = 1,732.37 × 1,007.51
4. Step 4: Simplify right side
   1,256.18x = 1,745,366.40
5. Step 5: Solve for x
   x = 1,745,366.40/1,256.18
6. Step 6: Final answer
   x = 1,389.43