Finding the Fourth Proportional to 22,921.76, 31,630.42 and 12,849.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,921.76 : 31,630.42 = 12,849.01 : x
2. Step 2: Convert to fraction form
   22,921.76/31,630.42 = 12,849.01/x
3. Step 3: Cross multiply
   22,921.76x = 31,630.42 × 12,849.01
4. Step 4: Simplify right side
   22,921.76x = 406,419,582.88
5. Step 5: Solve for x
   x = 406,419,582.88/22,921.76
6. Step 6: Final answer
   x = 17,730.73