Finding the Fourth Proportional to 1,787.67, 2,468.88 and 1,640.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,787.67 : 2,468.88 = 1,640.25 : x
2. Step 2: Convert to fraction form
   1,787.67/2,468.88 = 1,640.25/x
3. Step 3: Cross multiply
   1,787.67x = 2,468.88 × 1,640.25
4. Step 4: Simplify right side
   1,787.67x = 4,049,580.42
5. Step 5: Solve for x
   x = 4,049,580.42/1,787.67
6. Step 6: Final answer
   x = 2,265.28