Finding the Fourth Proportional to 9,338.72, 12,887.52 and 5,147.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,338.72 : 12,887.52 = 5,147.12 : x
2. Step 2: Convert to fraction form
   9,338.72/12,887.52 = 5,147.12/x
3. Step 3: Cross multiply
   9,338.72x = 12,887.52 × 5,147.12
4. Step 4: Simplify right side
   9,338.72x = 66,333,611.94
5. Step 5: Solve for x
   x = 66,333,611.94/9,338.72
6. Step 6: Final answer
   x = 7,103.07