Finding the Fourth Proportional to 22,770.76, 31,423.32 and 13,209.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,770.76 : 31,423.32 = 13,209.92 : x
2. Step 2: Convert to fraction form
   22,770.76/31,423.32 = 13,209.92/x
3. Step 3: Cross multiply
   22,770.76x = 31,423.32 × 13,209.92
4. Step 4: Simplify right side
   22,770.76x = 415,099,621.89
5. Step 5: Solve for x
   x = 415,099,621.89/22,770.76
6. Step 6: Final answer
   x = 18,229.50