Finding the Fourth Proportional to 1,377.83, 1,901.39 and 788.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.83 : 1,901.39 = 788.25 : x
2. Step 2: Convert to fraction form
   1,377.83/1,901.39 = 788.25/x
3. Step 3: Cross multiply
   1,377.83x = 1,901.39 × 788.25
4. Step 4: Simplify right side
   1,377.83x = 1,498,770.67
5. Step 5: Solve for x
   x = 1,498,770.67/1,377.83
6. Step 6: Final answer
   x = 1,087.78