Finding the Fourth Proportional to 1,377.32, 1,900.72 and 787.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.32 : 1,900.72 = 787.84 : x
2. Step 2: Convert to fraction form
   1,377.32/1,900.72 = 787.84/x
3. Step 3: Cross multiply
   1,377.32x = 1,900.72 × 787.84
4. Step 4: Simplify right side
   1,377.32x = 1,497,463.24
5. Step 5: Solve for x
   x = 1,497,463.24/1,377.32
6. Step 6: Final answer
   x = 1,087.23