Finding the Fourth Proportional to 2,354.80, 3,245.12 and 1,690.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,354.80 : 3,245.12 = 1,690.48 : x
2. Step 2: Convert to fraction form
   2,354.80/3,245.12 = 1,690.48/x
3. Step 3: Cross multiply
   2,354.80x = 3,245.12 × 1,690.48
4. Step 4: Simplify right side
   2,354.80x = 5,485,810.46
5. Step 5: Solve for x
   x = 5,485,810.46/2,354.80
6. Step 6: Final answer
   x = 2,329.63