Finding the Fourth Proportional to 1,508.57, 2,081.80 and 836.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.57 : 2,081.80 = 836.34 : x
2. Step 2: Convert to fraction form
   1,508.57/2,081.80 = 836.34/x
3. Step 3: Cross multiply
   1,508.57x = 2,081.80 × 836.34
4. Step 4: Simplify right side
   1,508.57x = 1,741,092.61
5. Step 5: Solve for x
   x = 1,741,092.61/1,508.57
6. Step 6: Final answer
   x = 1,154.13