Finding the Fourth Proportional to 13,509.90, 18,643.59 and 7,460.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,509.90 : 18,643.59 = 7,460.28 : x
2. Step 2: Convert to fraction form
   13,509.90/18,643.59 = 7,460.28/x
3. Step 3: Cross multiply
   13,509.90x = 18,643.59 × 7,460.28
4. Step 4: Simplify right side
   13,509.90x = 139,086,401.61
5. Step 5: Solve for x
   x = 139,086,401.61/13,509.90
6. Step 6: Final answer
   x = 10,295.15