Finding the Fourth Proportional to 1,438.90, 1,986.02 and 914.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.90 : 1,986.02 = 914.83 : x
2. Step 2: Convert to fraction form
   1,438.90/1,986.02 = 914.83/x
3. Step 3: Cross multiply
   1,438.90x = 1,986.02 × 914.83
4. Step 4: Simplify right side
   1,438.90x = 1,816,866.10
5. Step 5: Solve for x
   x = 1,816,866.10/1,438.90
6. Step 6: Final answer
   x = 1,262.68