Finding the Fourth Proportional to 22,499.57, 31,055.40 and 12,940.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,499.57 : 31,055.40 = 12,940.49 : x
2. Step 2: Convert to fraction form
   22,499.57/31,055.40 = 12,940.49/x
3. Step 3: Cross multiply
   22,499.57x = 31,055.40 × 12,940.49
4. Step 4: Simplify right side
   22,499.57x = 401,871,937.87
5. Step 5: Solve for x
   x = 401,871,937.87/22,499.57
6. Step 6: Final answer
   x = 17,861.32