Finding the Fourth Proportional to 1,353.38, 1,868.27 and 905.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.38 : 1,868.27 = 905.99 : x
2. Step 2: Convert to fraction form
   1,353.38/1,868.27 = 905.99/x
3. Step 3: Cross multiply
   1,353.38x = 1,868.27 × 905.99
4. Step 4: Simplify right side
   1,353.38x = 1,692,620.07
5. Step 5: Solve for x
   x = 1,692,620.07/1,353.38
6. Step 6: Final answer
   x = 1,250.67