Finding the Fourth Proportional to 2,478.82, 3,715.64 and 834.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.82 : 3,715.64 = 834.81 : x
2. Step 2: Convert to fraction form
   2,478.82/3,715.64 = 834.81/x
3. Step 3: Cross multiply
   2,478.82x = 3,715.64 × 834.81
4. Step 4: Simplify right side
   2,478.82x = 3,101,853.43
5. Step 5: Solve for x
   x = 3,101,853.43/2,478.82
6. Step 6: Final answer
   x = 1,251.34