Finding the Fourth Proportional to 1,715.78, 2,367.17 and 1,007.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.78 : 2,367.17 = 1,007.54 : x
2. Step 2: Convert to fraction form
   1,715.78/2,367.17 = 1,007.54/x
3. Step 3: Cross multiply
   1,715.78x = 2,367.17 × 1,007.54
4. Step 4: Simplify right side
   1,715.78x = 2,385,019.91
5. Step 5: Solve for x
   x = 2,385,019.91/1,715.78
6. Step 6: Final answer
   x = 1,390.05