Finding the Fourth Proportional to 1,377.07, 1,900.33 and 787.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.07 : 1,900.33 = 787.57 : x
2. Step 2: Convert to fraction form
   1,377.07/1,900.33 = 787.57/x
3. Step 3: Cross multiply
   1,377.07x = 1,900.33 × 787.57
4. Step 4: Simplify right side
   1,377.07x = 1,496,636.18
5. Step 5: Solve for x
   x = 1,496,636.18/1,377.07
6. Step 6: Final answer
   x = 1,086.83