Finding the Fourth Proportional to 2,406.92, 3,610.71 and 847.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.92 : 3,610.71 = 847.40 : x
2. Step 2: Convert to fraction form
   2,406.92/3,610.71 = 847.40/x
3. Step 3: Cross multiply
   2,406.92x = 3,610.71 × 847.40
4. Step 4: Simplify right side
   2,406.92x = 3,059,697.60
5. Step 5: Solve for x
   x = 3,059,697.60/2,406.92
6. Step 6: Final answer
   x = 1,271.21