Finding the Fourth Proportional to 1,715.54, 2,367.46 and 1,007.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.54 : 2,367.46 = 1,007.20 : x
2. Step 2: Convert to fraction form
   1,715.54/2,367.46 = 1,007.20/x
3. Step 3: Cross multiply
   1,715.54x = 2,367.46 × 1,007.20
4. Step 4: Simplify right side
   1,715.54x = 2,384,505.71
5. Step 5: Solve for x
   x = 2,384,505.71/1,715.54
6. Step 6: Final answer
   x = 1,389.94