Finding the Fourth Proportional to 13,599.60, 18,767.16 and 7,632.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,599.60 : 18,767.16 = 7,632.72 : x
2. Step 2: Convert to fraction form
   13,599.60/18,767.16 = 7,632.72/x
3. Step 3: Cross multiply
   13,599.60x = 18,767.16 × 7,632.72
4. Step 4: Simplify right side
   13,599.60x = 143,244,477.48
5. Step 5: Solve for x
   x = 143,244,477.48/13,599.60
6. Step 6: Final answer
   x = 10,532.99