Finding the Fourth Proportional to 1,377.50, 1,901.28 and 788.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.50 : 1,901.28 = 788.37 : x
2. Step 2: Convert to fraction form
   1,377.50/1,901.28 = 788.37/x
3. Step 3: Cross multiply
   1,377.50x = 1,901.28 × 788.37
4. Step 4: Simplify right side
   1,377.50x = 1,498,907.94
5. Step 5: Solve for x
   x = 1,498,907.94/1,377.50
6. Step 6: Final answer
   x = 1,088.14