Finding the Fourth Proportional to 1,376.86, 1,900.18 and 787.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.86 : 1,900.18 = 787.38 : x
2. Step 2: Convert to fraction form
   1,376.86/1,900.18 = 787.38/x
3. Step 3: Cross multiply
   1,376.86x = 1,900.18 × 787.38
4. Step 4: Simplify right side
   1,376.86x = 1,496,163.73
5. Step 5: Solve for x
   x = 1,496,163.73/1,376.86
6. Step 6: Final answer
   x = 1,086.65