Finding the Fourth Proportional to 2,322.84, 3,204.18 and 1,390.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,322.84 : 3,204.18 = 1,390.80 : x
2. Step 2: Convert to fraction form
   2,322.84/3,204.18 = 1,390.80/x
3. Step 3: Cross multiply
   2,322.84x = 3,204.18 × 1,390.80
4. Step 4: Simplify right side
   2,322.84x = 4,456,373.54
5. Step 5: Solve for x
   x = 4,456,373.54/2,322.84
6. Step 6: Final answer
   x = 1,918.50