Finding the Fourth Proportional to 12,191.72, 16,825.82 and 8,791.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.72 : 16,825.82 = 8,791.53 : x
2. Step 2: Convert to fraction form
   12,191.72/16,825.82 = 8,791.53/x
3. Step 3: Cross multiply
   12,191.72x = 16,825.82 × 8,791.53
4. Step 4: Simplify right side
   12,191.72x = 147,924,657.35
5. Step 5: Solve for x
   x = 147,924,657.35/12,191.72
6. Step 6: Final answer
   x = 12,133.21