Finding the Fourth Proportional to 9,151.85, 13,728.59 and 2,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.85 : 13,728.59 = 2,578.10 : x
2. Step 2: Convert to fraction form
   9,151.85/13,728.59 = 2,578.10/x
3. Step 3: Cross multiply
   9,151.85x = 13,728.59 × 2,578.10
4. Step 4: Simplify right side
   9,151.85x = 35,393,606.01
5. Step 5: Solve for x
   x = 35,393,606.01/9,151.85
6. Step 6: Final answer
   x = 3,867.37