Finding the Fourth Proportional to 1,377.55, 1,900.46 and 787.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.55 : 1,900.46 = 787.76 : x
2. Step 2: Convert to fraction form
   1,377.55/1,900.46 = 787.76/x
3. Step 3: Cross multiply
   1,377.55x = 1,900.46 × 787.76
4. Step 4: Simplify right side
   1,377.55x = 1,497,106.37
5. Step 5: Solve for x
   x = 1,497,106.37/1,377.55
6. Step 6: Final answer
   x = 1,086.79