Finding the Fourth Proportional to 1,772.88, 2,660.82 and 786.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.88 : 2,660.82 = 786.42 : x
2. Step 2: Convert to fraction form
   1,772.88/2,660.82 = 786.42/x
3. Step 3: Cross multiply
   1,772.88x = 2,660.82 × 786.42
4. Step 4: Simplify right side
   1,772.88x = 2,092,522.06
5. Step 5: Solve for x
   x = 2,092,522.06/1,772.88
6. Step 6: Final answer
   x = 1,180.30