Finding the Fourth Proportional to 23,178.22, 31,989.94 and 13,109.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,178.22 : 31,989.94 = 13,109.78 : x
2. Step 2: Convert to fraction form
   23,178.22/31,989.94 = 13,109.78/x
3. Step 3: Cross multiply
   23,178.22x = 31,989.94 × 13,109.78
4. Step 4: Simplify right side
   23,178.22x = 419,381,122.81
5. Step 5: Solve for x
   x = 419,381,122.81/23,178.22
6. Step 6: Final answer
   x = 18,093.76