Finding the Fourth Proportional to 1,787.78, 2,682.71 and 747.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,787.78 : 2,682.71 = 747.69 : x
2. Step 2: Convert to fraction form
   1,787.78/2,682.71 = 747.69/x
3. Step 3: Cross multiply
   1,787.78x = 2,682.71 × 747.69
4. Step 4: Simplify right side
   1,787.78x = 2,005,837.31
5. Step 5: Solve for x
   x = 2,005,837.31/1,787.78
6. Step 6: Final answer
   x = 1,121.97