Finding the Fourth Proportional to 22,471.56, 31,012.20 and 12,914.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,471.56 : 31,012.20 = 12,914.55 : x
2. Step 2: Convert to fraction form
   22,471.56/31,012.20 = 12,914.55/x
3. Step 3: Cross multiply
   22,471.56x = 31,012.20 × 12,914.55
4. Step 4: Simplify right side
   22,471.56x = 400,508,607.51
5. Step 5: Solve for x
   x = 400,508,607.51/22,471.56
6. Step 6: Final answer
   x = 17,822.91