Finding the Fourth Proportional to 10,290.54, 15,431.25 and 3,716.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,290.54 : 15,431.25 = 3,716.78 : x
2. Step 2: Convert to fraction form
   10,290.54/15,431.25 = 3,716.78/x
3. Step 3: Cross multiply
   10,290.54x = 15,431.25 × 3,716.78
4. Step 4: Simplify right side
   10,290.54x = 57,354,561.38
5. Step 5: Solve for x
   x = 57,354,561.38/10,290.54
6. Step 6: Final answer
   x = 5,573.52