Finding the Fourth Proportional to 2,085.33, 3,127.77 and 836.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.33 : 3,127.77 = 836.45 : x
2. Step 2: Convert to fraction form
   2,085.33/3,127.77 = 836.45/x
3. Step 3: Cross multiply
   2,085.33x = 3,127.77 × 836.45
4. Step 4: Simplify right side
   2,085.33x = 2,616,223.22
5. Step 5: Solve for x
   x = 2,616,223.22/2,085.33
6. Step 6: Final answer
   x = 1,254.58