Finding the Fourth Proportional to 9,333.98, 12,880.92 and 5,142.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,333.98 : 12,880.92 = 5,142.23 : x
2. Step 2: Convert to fraction form
   9,333.98/12,880.92 = 5,142.23/x
3. Step 3: Cross multiply
   9,333.98x = 12,880.92 × 5,142.23
4. Step 4: Simplify right side
   9,333.98x = 66,236,728.89
5. Step 5: Solve for x
   x = 66,236,728.89/9,333.98
6. Step 6: Final answer
   x = 7,096.30