Finding the Fourth Proportional to 22,942.63, 31,660.33 and 12,870.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,942.63 : 31,660.33 = 12,870.89 : x
2. Step 2: Convert to fraction form
   22,942.63/31,660.33 = 12,870.89/x
3. Step 3: Cross multiply
   22,942.63x = 31,660.33 × 12,870.89
4. Step 4: Simplify right side
   22,942.63x = 407,496,624.79
5. Step 5: Solve for x
   x = 407,496,624.79/22,942.63
6. Step 6: Final answer
   x = 17,761.55