Finding the Fourth Proportional to 1,494.19, 2,228.12 and 1,390.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,494.19 : 2,228.12 = 1,390.31 : x
2. Step 2: Convert to fraction form
   1,494.19/2,228.12 = 1,390.31/x
3. Step 3: Cross multiply
   1,494.19x = 2,228.12 × 1,390.31
4. Step 4: Simplify right side
   1,494.19x = 3,097,766.38
5. Step 5: Solve for x
   x = 3,097,766.38/1,494.19
6. Step 6: Final answer
   x = 2,073.21