Finding the Fourth Proportional to 22,512.47, 31,071.06 and 13,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,512.47 : 31,071.06 = 13,086.50 : x
2. Step 2: Convert to fraction form
   22,512.47/31,071.06 = 13,086.50/x
3. Step 3: Cross multiply
   22,512.47x = 31,071.06 × 13,086.50
4. Step 4: Simplify right side
   22,512.47x = 406,611,271.33
5. Step 5: Solve for x
   x = 406,611,271.33/22,512.47
6. Step 6: Final answer
   x = 18,061.61