Finding the Fourth Proportional to 1,377.48, 1,900.14 and 905.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.48 : 1,900.14 = 905.46 : x
2. Step 2: Convert to fraction form
   1,377.48/1,900.14 = 905.46/x
3. Step 3: Cross multiply
   1,377.48x = 1,900.14 × 905.46
4. Step 4: Simplify right side
   1,377.48x = 1,720,500.76
5. Step 5: Solve for x
   x = 1,720,500.76/1,377.48
6. Step 6: Final answer
   x = 1,249.02