Finding the Fourth Proportional to 2,002.22, 3,004.88 and 1,390.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.22 : 3,004.88 = 1,390.22 : x
2. Step 2: Convert to fraction form
   2,002.22/3,004.88 = 1,390.22/x
3. Step 3: Cross multiply
   2,002.22x = 3,004.88 × 1,390.22
4. Step 4: Simplify right side
   2,002.22x = 4,177,444.27
5. Step 5: Solve for x
   x = 4,177,444.27/2,002.22
6. Step 6: Final answer
   x = 2,086.41