Finding the Fourth Proportional to 8,865.89, 12,235.28 and 4,887.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,865.89 : 12,235.28 = 4,887.30 : x
2. Step 2: Convert to fraction form
   8,865.89/12,235.28 = 4,887.30/x
3. Step 3: Cross multiply
   8,865.89x = 12,235.28 × 4,887.30
4. Step 4: Simplify right side
   8,865.89x = 59,797,459.51
5. Step 5: Solve for x
   x = 59,797,459.51/8,865.89
6. Step 6: Final answer
   x = 6,744.67