Finding the Fourth Proportional to 1,357.39, 1,872.20 and 984.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.39 : 1,872.20 = 984.99 : x
2. Step 2: Convert to fraction form
   1,357.39/1,872.20 = 984.99/x
3. Step 3: Cross multiply
   1,357.39x = 1,872.20 × 984.99
4. Step 4: Simplify right side
   1,357.39x = 1,844,098.28
5. Step 5: Solve for x
   x = 1,844,098.28/1,357.39
6. Step 6: Final answer
   x = 1,358.56