Finding the Fourth Proportional to 1,377.48, 1,902.42 and 936.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.48 : 1,902.42 = 936.12 : x
2. Step 2: Convert to fraction form
   1,377.48/1,902.42 = 936.12/x
3. Step 3: Cross multiply
   1,377.48x = 1,902.42 × 936.12
4. Step 4: Simplify right side
   1,377.48x = 1,780,893.41
5. Step 5: Solve for x
   x = 1,780,893.41/1,377.48
6. Step 6: Final answer
   x = 1,292.86