Finding the Fourth Proportional to 2,063.20, 2,846.69 and 1,223.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,063.20 : 2,846.69 = 1,223.86 : x
2. Step 2: Convert to fraction form
   2,063.20/2,846.69 = 1,223.86/x
3. Step 3: Cross multiply
   2,063.20x = 2,846.69 × 1,223.86
4. Step 4: Simplify right side
   2,063.20x = 3,483,953.60
5. Step 5: Solve for x
   x = 3,483,953.60/2,063.20
6. Step 6: Final answer
   x = 1,688.62