Finding the Fourth Proportional to 1,377.40, 1,901.24 and 788.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.40 : 1,901.24 = 788.32 : x
2. Step 2: Convert to fraction form
   1,377.40/1,901.24 = 788.32/x
3. Step 3: Cross multiply
   1,377.40x = 1,901.24 × 788.32
4. Step 4: Simplify right side
   1,377.40x = 1,498,785.52
5. Step 5: Solve for x
   x = 1,498,785.52/1,377.40
6. Step 6: Final answer
   x = 1,088.13