Finding the Fourth Proportional to 22,770.45, 31,423.25 and 12,561.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,770.45 : 31,423.25 = 12,561.25 : x
2. Step 2: Convert to fraction form
   22,770.45/31,423.25 = 12,561.25/x
3. Step 3: Cross multiply
   22,770.45x = 31,423.25 × 12,561.25
4. Step 4: Simplify right side
   22,770.45x = 394,715,228.38
5. Step 5: Solve for x
   x = 394,715,228.38/22,770.45
6. Step 6: Final answer
   x = 17,334.54