Finding the Fourth Proportional to 1,392.07, 2,084.57 and 836.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.07 : 2,084.57 = 836.43 : x
2. Step 2: Convert to fraction form
   1,392.07/2,084.57 = 836.43/x
3. Step 3: Cross multiply
   1,392.07x = 2,084.57 × 836.43
4. Step 4: Simplify right side
   1,392.07x = 1,743,596.89
5. Step 5: Solve for x
   x = 1,743,596.89/1,392.07
6. Step 6: Final answer
   x = 1,252.52