Finding the Fourth Proportional to 2,888.72, 4,333.12 and 836.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,888.72 : 4,333.12 = 836.72 : x
2. Step 2: Convert to fraction form
   2,888.72/4,333.12 = 836.72/x
3. Step 3: Cross multiply
   2,888.72x = 4,333.12 × 836.72
4. Step 4: Simplify right side
   2,888.72x = 3,625,608.17
5. Step 5: Solve for x
   x = 3,625,608.17/2,888.72
6. Step 6: Final answer
   x = 1,255.09