Finding the Fourth Proportional to 2,323.45, 3,485.78 and 680.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,323.45 : 3,485.78 = 680.05 : x
2. Step 2: Convert to fraction form
   2,323.45/3,485.78 = 680.05/x
3. Step 3: Cross multiply
   2,323.45x = 3,485.78 × 680.05
4. Step 4: Simplify right side
   2,323.45x = 2,370,483.86
5. Step 5: Solve for x
   x = 2,370,483.86/2,323.45
6. Step 6: Final answer
   x = 1,020.25