Finding the Fourth Proportional to 2,320.42, 3,200.73 and 1,690.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,320.42 : 3,200.73 = 1,690.18 : x
2. Step 2: Convert to fraction form
   2,320.42/3,200.73 = 1,690.18/x
3. Step 3: Cross multiply
   2,320.42x = 3,200.73 × 1,690.18
4. Step 4: Simplify right side
   2,320.42x = 5,409,809.83
5. Step 5: Solve for x
   x = 5,409,809.83/2,320.42
6. Step 6: Final answer
   x = 2,331.39