Finding the Fourth Proportional to 9,336.25, 12,884.84 and 5,145.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,336.25 : 12,884.84 = 5,145.31 : x
2. Step 2: Convert to fraction form
   9,336.25/12,884.84 = 5,145.31/x
3. Step 3: Cross multiply
   9,336.25x = 12,884.84 × 5,145.31
4. Step 4: Simplify right side
   9,336.25x = 66,296,496.10
5. Step 5: Solve for x
   x = 66,296,496.10/9,336.25
6. Step 6: Final answer
   x = 7,100.98