Finding the Fourth Proportional to 8,859.50, 12,231.98 and 5,507.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,859.50 : 12,231.98 = 5,507.32 : x
2. Step 2: Convert to fraction form
   8,859.50/12,231.98 = 5,507.32/x
3. Step 3: Cross multiply
   8,859.50x = 12,231.98 × 5,507.32
4. Step 4: Simplify right side
   8,859.50x = 67,365,428.09
5. Step 5: Solve for x
   x = 67,365,428.09/8,859.50
6. Step 6: Final answer
   x = 7,603.75