Finding the Fourth Proportional to 9,169.61, 12,654.12 and 5,191.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,169.61 : 12,654.12 = 5,191.49 : x
2. Step 2: Convert to fraction form
   9,169.61/12,654.12 = 5,191.49/x
3. Step 3: Cross multiply
   9,169.61x = 12,654.12 × 5,191.49
4. Step 4: Simplify right side
   9,169.61x = 65,693,788.54
5. Step 5: Solve for x
   x = 65,693,788.54/9,169.61
6. Step 6: Final answer
   x = 7,164.30