Finding the Fourth Proportional to 22,602, 31,191.12 and 12,666

Step by Step Solution

1. Step 1: Write the proportion equation
   22,602 : 31,191.12 = 12,666 : x
2. Step 2: Convert to fraction form
   22,602/31,191.12 = 12,666/x
3. Step 3: Cross multiply
   22,602x = 31,191.12 × 12,666
4. Step 4: Simplify right side
   22,602x = 395,066,725.92
5. Step 5: Solve for x
   x = 395,066,725.92/22,602
6. Step 6: Final answer
   x = 17,479.28