Finding the Fourth Proportional to 2,384.24, 3,290.22 and 1,390.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,384.24 : 3,290.22 = 1,390.16 : x
2. Step 2: Convert to fraction form
   2,384.24/3,290.22 = 1,390.16/x
3. Step 3: Cross multiply
   2,384.24x = 3,290.22 × 1,390.16
4. Step 4: Simplify right side
   2,384.24x = 4,573,940.46
5. Step 5: Solve for x
   x = 4,573,940.46/2,384.24
6. Step 6: Final answer
   x = 1,918.41