Finding the Fourth Proportional to 2,139.96, 3,211.32 and 841.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.96 : 3,211.32 = 841.52 : x
2. Step 2: Convert to fraction form
   2,139.96/3,211.32 = 841.52/x
3. Step 3: Cross multiply
   2,139.96x = 3,211.32 × 841.52
4. Step 4: Simplify right side
   2,139.96x = 2,702,390.01
5. Step 5: Solve for x
   x = 2,702,390.01/2,139.96
6. Step 6: Final answer
   x = 1,262.82