Finding the Fourth Proportional to 10,274.09, 15,401.79 and 3,698.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,274.09 : 15,401.79 = 3,698.78 : x
2. Step 2: Convert to fraction form
   10,274.09/15,401.79 = 3,698.78/x
3. Step 3: Cross multiply
   10,274.09x = 15,401.79 × 3,698.78
4. Step 4: Simplify right side
   10,274.09x = 56,967,755.81
5. Step 5: Solve for x
   x = 56,967,755.81/10,274.09
6. Step 6: Final answer
   x = 5,544.80