Finding the Fourth Proportional to 1,377.02, 1,900.31 and 787.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.02 : 1,900.31 = 787.56 : x
2. Step 2: Convert to fraction form
   1,377.02/1,900.31 = 787.56/x
3. Step 3: Cross multiply
   1,377.02x = 1,900.31 × 787.56
4. Step 4: Simplify right side
   1,377.02x = 1,496,604.21
5. Step 5: Solve for x
   x = 1,496,604.21/1,377.02
6. Step 6: Final answer
   x = 1,086.85