Finding the Fourth Proportional to 1,715.39, 2,367.20 and 1,007.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.39 : 2,367.20 = 1,007.10 : x
2. Step 2: Convert to fraction form
   1,715.39/2,367.20 = 1,007.10/x
3. Step 3: Cross multiply
   1,715.39x = 2,367.20 × 1,007.10
4. Step 4: Simplify right side
   1,715.39x = 2,384,009.64
5. Step 5: Solve for x
   x = 2,384,009.64/1,715.39
6. Step 6: Final answer
   x = 1,389.78