Finding the Fourth Proportional to 9,103.56, 12,564.51 and 8,688.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,103.56 : 12,564.51 = 8,688.03 : x
2. Step 2: Convert to fraction form
   9,103.56/12,564.51 = 8,688.03/x
3. Step 3: Cross multiply
   9,103.56x = 12,564.51 × 8,688.03
4. Step 4: Simplify right side
   9,103.56x = 109,160,839.82
5. Step 5: Solve for x
   x = 109,160,839.82/9,103.56
6. Step 6: Final answer
   x = 11,991.01