Finding the Fourth Proportional to 23,178.18, 31,987.51 and 13,106.71

Step by Step Solution

1. Step 1: Write the proportion equation
   23,178.18 : 31,987.51 = 13,106.71 : x
2. Step 2: Convert to fraction form
   23,178.18/31,987.51 = 13,106.71/x
3. Step 3: Cross multiply
   23,178.18x = 31,987.51 × 13,106.71
4. Step 4: Simplify right side
   23,178.18x = 419,251,024.41
5. Step 5: Solve for x
   x = 419,251,024.41/23,178.18
6. Step 6: Final answer
   x = 18,088.17