Finding the Fourth Proportional to 12,112.58, 18,165.56 and 7,663.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.58 : 18,165.56 = 7,663.56 : x
2. Step 2: Convert to fraction form
   12,112.58/18,165.56 = 7,663.56/x
3. Step 3: Cross multiply
   12,112.58x = 18,165.56 × 7,663.56
4. Step 4: Simplify right side
   12,112.58x = 139,212,752.55
5. Step 5: Solve for x
   x = 139,212,752.55/12,112.58
6. Step 6: Final answer
   x = 11,493.23