Finding the Fourth Proportional to 9,171.39, 12,658.65 and 5,394.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.39 : 12,658.65 = 5,394.78 : x
2. Step 2: Convert to fraction form
   9,171.39/12,658.65 = 5,394.78/x
3. Step 3: Cross multiply
   9,171.39x = 12,658.65 × 5,394.78
4. Step 4: Simplify right side
   9,171.39x = 68,290,631.85
5. Step 5: Solve for x
   x = 68,290,631.85/9,171.39
6. Step 6: Final answer
   x = 7,446.05