Finding the Fourth Proportional to 2,145.29, 3,217.73 and 846.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.29 : 3,217.73 = 846.86 : x
2. Step 2: Convert to fraction form
   2,145.29/3,217.73 = 846.86/x
3. Step 3: Cross multiply
   2,145.29x = 3,217.73 × 846.86
4. Step 4: Simplify right side
   2,145.29x = 2,724,946.50
5. Step 5: Solve for x
   x = 2,724,946.50/2,145.29
6. Step 6: Final answer
   x = 1,270.20