Finding the Fourth Proportional to 22,659.50, 31,272.34 and 13,099.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,659.50 : 31,272.34 = 13,099.80 : x
2. Step 2: Convert to fraction form
   22,659.50/31,272.34 = 13,099.80/x
3. Step 3: Cross multiply
   22,659.50x = 31,272.34 × 13,099.80
4. Step 4: Simplify right side
   22,659.50x = 409,661,399.53
5. Step 5: Solve for x
   x = 409,661,399.53/22,659.50
6. Step 6: Final answer
   x = 18,079.01