Finding the Fourth Proportional to 2,087.02, 3,128.70 and 787.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.02 : 3,128.70 = 787.54 : x
2. Step 2: Convert to fraction form
   2,087.02/3,128.70 = 787.54/x
3. Step 3: Cross multiply
   2,087.02x = 3,128.70 × 787.54
4. Step 4: Simplify right side
   2,087.02x = 2,463,976.40
5. Step 5: Solve for x
   x = 2,463,976.40/2,087.02
6. Step 6: Final answer
   x = 1,180.62