Finding the Fourth Proportional to 9,391.98, 12,962.52 and 5,415.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.98 : 12,962.52 = 5,415.42 : x
2. Step 2: Convert to fraction form
   9,391.98/12,962.52 = 5,415.42/x
3. Step 3: Cross multiply
   9,391.98x = 12,962.52 × 5,415.42
4. Step 4: Simplify right side
   9,391.98x = 70,197,490.06
5. Step 5: Solve for x
   x = 70,197,490.06/9,391.98
6. Step 6: Final answer
   x = 7,474.20