Finding the Fourth Proportional to 13,632.05, 18,812.98 and 7,664.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,632.05 : 18,812.98 = 7,664.09 : x
2. Step 2: Convert to fraction form
   13,632.05/18,812.98 = 7,664.09/x
3. Step 3: Cross multiply
   13,632.05x = 18,812.98 × 7,664.09
4. Step 4: Simplify right side
   13,632.05x = 144,184,467.69
5. Step 5: Solve for x
   x = 144,184,467.69/13,632.05
6. Step 6: Final answer
   x = 10,576.88