Finding the Fourth Proportional to 1,402.67, 1,935.27 and 905.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.67 : 1,935.27 = 905.10 : x
2. Step 2: Convert to fraction form
   1,402.67/1,935.27 = 905.10/x
3. Step 3: Cross multiply
   1,402.67x = 1,935.27 × 905.10
4. Step 4: Simplify right side
   1,402.67x = 1,751,612.88
5. Step 5: Solve for x
   x = 1,751,612.88/1,402.67
6. Step 6: Final answer
   x = 1,248.77