Finding the Fourth Proportional to 22,686.18, 31,304.79 and 21,014.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,686.18 : 31,304.79 = 21,014.34 : x
2. Step 2: Convert to fraction form
   22,686.18/31,304.79 = 21,014.34/x
3. Step 3: Cross multiply
   22,686.18x = 31,304.79 × 21,014.34
4. Step 4: Simplify right side
   22,686.18x = 657,849,500.69
5. Step 5: Solve for x
   x = 657,849,500.69/22,686.18
6. Step 6: Final answer
   x = 28,997.81