Finding the Fourth Proportional to 7,338.72, 10,127.21 and 4,151.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,338.72 : 10,127.21 = 4,151.78 : x
2. Step 2: Convert to fraction form
   7,338.72/10,127.21 = 4,151.78/x
3. Step 3: Cross multiply
   7,338.72x = 10,127.21 × 4,151.78
4. Step 4: Simplify right side
   7,338.72x = 42,045,876.54
5. Step 5: Solve for x
   x = 42,045,876.54/7,338.72
6. Step 6: Final answer
   x = 5,729.32