Finding the Fourth Proportional to 2,388.69, 3,582.28 and 807.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.69 : 3,582.28 = 807.10 : x
2. Step 2: Convert to fraction form
   2,388.69/3,582.28 = 807.10/x
3. Step 3: Cross multiply
   2,388.69x = 3,582.28 × 807.10
4. Step 4: Simplify right side
   2,388.69x = 2,891,270.39
5. Step 5: Solve for x
   x = 2,891,270.39/2,388.69
6. Step 6: Final answer
   x = 1,210.40