Finding the Fourth Proportional to 13,300.72, 18,355.78 and 7,635.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.72 : 18,355.78 = 7,635.48 : x
2. Step 2: Convert to fraction form
   13,300.72/18,355.78 = 7,635.48/x
3. Step 3: Cross multiply
   13,300.72x = 18,355.78 × 7,635.48
4. Step 4: Simplify right side
   13,300.72x = 140,155,235.04
5. Step 5: Solve for x
   x = 140,155,235.04/13,300.72
6. Step 6: Final answer
   x = 10,537.41