Finding the Fourth Proportional to 1,377.92, 1,901.37 and 788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.92 : 1,901.37 = 788.42 : x
2. Step 2: Convert to fraction form
   1,377.92/1,901.37 = 788.42/x
3. Step 3: Cross multiply
   1,377.92x = 1,901.37 × 788.42
4. Step 4: Simplify right side
   1,377.92x = 1,499,078.14
5. Step 5: Solve for x
   x = 1,499,078.14/1,377.92
6. Step 6: Final answer
   x = 1,087.93