Finding the Fourth Proportional to 1,377.94, 1,901.62 and 788.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.94 : 1,901.62 = 788.32 : x
2. Step 2: Convert to fraction form
   1,377.94/1,901.62 = 788.32/x
3. Step 3: Cross multiply
   1,377.94x = 1,901.62 × 788.32
4. Step 4: Simplify right side
   1,377.94x = 1,499,085.08
5. Step 5: Solve for x
   x = 1,499,085.08/1,377.94
6. Step 6: Final answer
   x = 1,087.92