Finding the Fourth Proportional to 14,504.78, 21,753.16 and 5,143.57

Step by Step Solution

1. Step 1: Write the proportion equation
   14,504.78 : 21,753.16 = 5,143.57 : x
2. Step 2: Convert to fraction form
   14,504.78/21,753.16 = 5,143.57/x
3. Step 3: Cross multiply
   14,504.78x = 21,753.16 × 5,143.57
4. Step 4: Simplify right side
   14,504.78x = 111,888,901.18
5. Step 5: Solve for x
   x = 111,888,901.18/14,504.78
6. Step 6: Final answer
   x = 7,713.93