Finding the Fourth Proportional to 1,036.71, 1,424.81 and 1,007.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.71 : 1,424.81 = 1,007.55 : x
2. Step 2: Convert to fraction form
   1,036.71/1,424.81 = 1,007.55/x
3. Step 3: Cross multiply
   1,036.71x = 1,424.81 × 1,007.55
4. Step 4: Simplify right side
   1,036.71x = 1,435,569.83
5. Step 5: Solve for x
   x = 1,435,569.83/1,036.71
6. Step 6: Final answer
   x = 1,384.74