Finding the Fourth Proportional to 9,663.30, 13,308.30 and 8,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.30 : 13,308.30 = 8,788.50 : x
2. Step 2: Convert to fraction form
   9,663.30/13,308.30 = 8,788.50/x
3. Step 3: Cross multiply
   9,663.30x = 13,308.30 × 8,788.50
4. Step 4: Simplify right side
   9,663.30x = 116,959,994.55
5. Step 5: Solve for x
   x = 116,959,994.55/9,663.30
6. Step 6: Final answer
   x = 12,103.53