Finding the Fourth Proportional to 1,424.38, 1,965.54 and 786.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.38 : 1,965.54 = 786.19 : x
2. Step 2: Convert to fraction form
   1,424.38/1,965.54 = 786.19/x
3. Step 3: Cross multiply
   1,424.38x = 1,965.54 × 786.19
4. Step 4: Simplify right side
   1,424.38x = 1,545,287.89
5. Step 5: Solve for x
   x = 1,545,287.89/1,424.38
6. Step 6: Final answer
   x = 1,084.88