Finding the Fourth Proportional to 14,503.78, 21,751.69 and 5,142.54

Step by Step Solution

1. Step 1: Write the proportion equation
   14,503.78 : 21,751.69 = 5,142.54 : x
2. Step 2: Convert to fraction form
   14,503.78/21,751.69 = 5,142.54/x
3. Step 3: Cross multiply
   14,503.78x = 21,751.69 × 5,142.54
4. Step 4: Simplify right side
   14,503.78x = 111,858,935.89
5. Step 5: Solve for x
   x = 111,858,935.89/14,503.78
6. Step 6: Final answer
   x = 7,712.40