Finding the Fourth Proportional to 2,498.32, 3,747.42 and 856

Step by Step Solution

1. Step 1: Write the proportion equation
   2,498.32 : 3,747.42 = 856 : x
2. Step 2: Convert to fraction form
   2,498.32/3,747.42 = 856/x
3. Step 3: Cross multiply
   2,498.32x = 3,747.42 × 856
4. Step 4: Simplify right side
   2,498.32x = 3,207,791.52
5. Step 5: Solve for x
   x = 3,207,791.52/2,498.32
6. Step 6: Final answer
   x = 1,283.98