Finding the Fourth Proportional to 2,223.31, 3,333.45 and 836.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.31 : 3,333.45 = 836.39 : x
2. Step 2: Convert to fraction form
   2,223.31/3,333.45 = 836.39/x
3. Step 3: Cross multiply
   2,223.31x = 3,333.45 × 836.39
4. Step 4: Simplify right side
   2,223.31x = 2,788,064.25
5. Step 5: Solve for x
   x = 2,788,064.25/2,223.31
6. Step 6: Final answer
   x = 1,254.02