Finding the Fourth Proportional to 22,922, 31,632.84 and 12,986

Step by Step Solution

1. Step 1: Write the proportion equation
   22,922 : 31,632.84 = 12,986 : x
2. Step 2: Convert to fraction form
   22,922/31,632.84 = 12,986/x
3. Step 3: Cross multiply
   22,922x = 31,632.84 × 12,986
4. Step 4: Simplify right side
   22,922x = 410,784,060.24
5. Step 5: Solve for x
   x = 410,784,060.24/22,922
6. Step 6: Final answer
   x = 17,920.95