Finding the Fourth Proportional to 9,300.42, 12,824.12 and 7,171.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.42 : 12,824.12 = 7,171.13 : x
2. Step 2: Convert to fraction form
   9,300.42/12,824.12 = 7,171.13/x
3. Step 3: Cross multiply
   9,300.42x = 12,824.12 × 7,171.13
4. Step 4: Simplify right side
   9,300.42x = 91,963,395.80
5. Step 5: Solve for x
   x = 91,963,395.80/9,300.42
6. Step 6: Final answer
   x = 9,888.09