Finding the Fourth Proportional to 2,200.80, 3,298.30 and 1,685.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.80 : 3,298.30 = 1,685.28 : x
2. Step 2: Convert to fraction form
   2,200.80/3,298.30 = 1,685.28/x
3. Step 3: Cross multiply
   2,200.80x = 3,298.30 × 1,685.28
4. Step 4: Simplify right side
   2,200.80x = 5,558,559.02
5. Step 5: Solve for x
   x = 5,558,559.02/2,200.80
6. Step 6: Final answer
   x = 2,525.70