Finding the Fourth Proportional to 9,310.89, 12,847.35 and 5,277.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,310.89 : 12,847.35 = 5,277.72 : x
2. Step 2: Convert to fraction form
   9,310.89/12,847.35 = 5,277.72/x
3. Step 3: Cross multiply
   9,310.89x = 12,847.35 × 5,277.72
4. Step 4: Simplify right side
   9,310.89x = 67,804,716.04
5. Step 5: Solve for x
   x = 67,804,716.04/9,310.89
6. Step 6: Final answer
   x = 7,282.30