Finding the Fourth Proportional to 1,377.24, 1,900.12 and 787.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.24 : 1,900.12 = 787.56 : x
2. Step 2: Convert to fraction form
   1,377.24/1,900.12 = 787.56/x
3. Step 3: Cross multiply
   1,377.24x = 1,900.12 × 787.56
4. Step 4: Simplify right side
   1,377.24x = 1,496,458.51
5. Step 5: Solve for x
   x = 1,496,458.51/1,377.24
6. Step 6: Final answer
   x = 1,086.56