Finding the Fourth Proportional to 1,412.34, 2,106.52 and 1,228.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.34 : 2,106.52 = 1,228.28 : x
2. Step 2: Convert to fraction form
   1,412.34/2,106.52 = 1,228.28/x
3. Step 3: Cross multiply
   1,412.34x = 2,106.52 × 1,228.28
4. Step 4: Simplify right side
   1,412.34x = 2,587,396.39
5. Step 5: Solve for x
   x = 2,587,396.39/1,412.34
6. Step 6: Final answer
   x = 1,831.99