Finding the Fourth Proportional to 21,710.78, 29,951.37 and 12,754.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,710.78 : 29,951.37 = 12,754.25 : x
2. Step 2: Convert to fraction form
   21,710.78/29,951.37 = 12,754.25/x
3. Step 3: Cross multiply
   21,710.78x = 29,951.37 × 12,754.25
4. Step 4: Simplify right side
   21,710.78x = 382,007,047.29
5. Step 5: Solve for x
   x = 382,007,047.29/21,710.78
6. Step 6: Final answer
   x = 17,595.27