Finding the Fourth Proportional to 13,630.55, 18,809.79 and 7,662.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,630.55 : 18,809.79 = 7,662.09 : x
2. Step 2: Convert to fraction form
   13,630.55/18,809.79 = 7,662.09/x
3. Step 3: Cross multiply
   13,630.55x = 18,809.79 × 7,662.09
4. Step 4: Simplify right side
   13,630.55x = 144,122,410.31
5. Step 5: Solve for x
   x = 144,122,410.31/13,630.55
6. Step 6: Final answer
   x = 10,573.48