Finding the Fourth Proportional to 1,372.04, 1,892.94 and 905.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.04 : 1,892.94 = 905.48 : x
2. Step 2: Convert to fraction form
   1,372.04/1,892.94 = 905.48/x
3. Step 3: Cross multiply
   1,372.04x = 1,892.94 × 905.48
4. Step 4: Simplify right side
   1,372.04x = 1,714,019.31
5. Step 5: Solve for x
   x = 1,714,019.31/1,372.04
6. Step 6: Final answer
   x = 1,249.25