Finding the Fourth Proportional to 1,353.70, 1,868.71 and 906.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.70 : 1,868.71 = 906.28 : x
2. Step 2: Convert to fraction form
   1,353.70/1,868.71 = 906.28/x
3. Step 3: Cross multiply
   1,353.70x = 1,868.71 × 906.28
4. Step 4: Simplify right side
   1,353.70x = 1,693,574.50
5. Step 5: Solve for x
   x = 1,693,574.50/1,353.70
6. Step 6: Final answer
   x = 1,251.07