Finding the Fourth Proportional to 22,660.50, 31,273.72 and 13,100.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,660.50 : 31,273.72 = 13,100.80 : x
2. Step 2: Convert to fraction form
   22,660.50/31,273.72 = 13,100.80/x
3. Step 3: Cross multiply
   22,660.50x = 31,273.72 × 13,100.80
4. Step 4: Simplify right side
   22,660.50x = 409,710,750.98
5. Step 5: Solve for x
   x = 409,710,750.98/22,660.50
6. Step 6: Final answer
   x = 18,080.39