Finding the Fourth Proportional to 9,152.47, 13,728.91 and 2,578.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.47 : 13,728.91 = 2,578.51 : x
2. Step 2: Convert to fraction form
   9,152.47/13,728.91 = 2,578.51/x
3. Step 3: Cross multiply
   9,152.47x = 13,728.91 × 2,578.51
4. Step 4: Simplify right side
   9,152.47x = 35,400,090.96
5. Step 5: Solve for x
   x = 35,400,090.96/9,152.47
6. Step 6: Final answer
   x = 3,867.82