Finding the Fourth Proportional to 22,940.51, 31,667.61 and 13,991.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,940.51 : 31,667.61 = 13,991.22 : x
2. Step 2: Convert to fraction form
   22,940.51/31,667.61 = 13,991.22/x
3. Step 3: Cross multiply
   22,940.51x = 31,667.61 × 13,991.22
4. Step 4: Simplify right side
   22,940.51x = 443,068,498.38
5. Step 5: Solve for x
   x = 443,068,498.38/22,940.51
6. Step 6: Final answer
   x = 19,313.81