Finding the Fourth Proportional to 9,320.29, 12,858.71 and 5,286.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,320.29 : 12,858.71 = 5,286.53 : x
2. Step 2: Convert to fraction form
   9,320.29/12,858.71 = 5,286.53/x
3. Step 3: Cross multiply
   9,320.29x = 12,858.71 × 5,286.53
4. Step 4: Simplify right side
   9,320.29x = 67,977,961.89
5. Step 5: Solve for x
   x = 67,977,961.89/9,320.29
6. Step 6: Final answer
   x = 7,293.55