Finding the Fourth Proportional to 9,300.21, 12,834.15 and 5,212.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.21 : 12,834.15 = 5,212.02 : x
2. Step 2: Convert to fraction form
   9,300.21/12,834.15 = 5,212.02/x
3. Step 3: Cross multiply
   9,300.21x = 12,834.15 × 5,212.02
4. Step 4: Simplify right side
   9,300.21x = 66,891,846.48
5. Step 5: Solve for x
   x = 66,891,846.48/9,300.21
6. Step 6: Final answer
   x = 7,192.51