Finding the Fourth Proportional to 1,426.80, 1,967.40 and 984.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.80 : 1,967.40 = 984.99 : x
2. Step 2: Convert to fraction form
   1,426.80/1,967.40 = 984.99/x
3. Step 3: Cross multiply
   1,426.80x = 1,967.40 × 984.99
4. Step 4: Simplify right side
   1,426.80x = 1,937,869.33
5. Step 5: Solve for x
   x = 1,937,869.33/1,426.80
6. Step 6: Final answer
   x = 1,358.19