Finding the Fourth Proportional to 1,833.98, 2,740.50 and 1,392.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,833.98 : 2,740.50 = 1,392.80 : x
2. Step 2: Convert to fraction form
   1,833.98/2,740.50 = 1,392.80/x
3. Step 3: Cross multiply
   1,833.98x = 2,740.50 × 1,392.80
4. Step 4: Simplify right side
   1,833.98x = 3,816,954.70
5. Step 5: Solve for x
   x = 3,816,954.70/1,833.98
6. Step 6: Final answer
   x = 2,081.25