Finding the Fourth Proportional to 22,769.69, 31,422.31 and 12,698.77

Step by Step Solution

1. Step 1: Write the proportion equation
   22,769.69 : 31,422.31 = 12,698.77 : x
2. Step 2: Convert to fraction form
   22,769.69/31,422.31 = 12,698.77/x
3. Step 3: Cross multiply
   22,769.69x = 31,422.31 × 12,698.77
4. Step 4: Simplify right side
   22,769.69x = 399,024,687.56
5. Step 5: Solve for x
   x = 399,024,687.56/22,769.69
6. Step 6: Final answer
   x = 17,524.38