Finding the Fourth Proportional to 22,119.82, 30,529.29 and 13,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,119.82 : 30,529.29 = 13,172.50 : x
2. Step 2: Convert to fraction form
   22,119.82/30,529.29 = 13,172.50/x
3. Step 3: Cross multiply
   22,119.82x = 30,529.29 × 13,172.50
4. Step 4: Simplify right side
   22,119.82x = 402,147,072.53
5. Step 5: Solve for x
   x = 402,147,072.53/22,119.82
6. Step 6: Final answer
   x = 18,180.40