Finding the Fourth Proportional to 23,089.86, 31,864.05 and 13,018.39

Step by Step Solution

1. Step 1: Write the proportion equation
   23,089.86 : 31,864.05 = 13,018.39 : x
2. Step 2: Convert to fraction form
   23,089.86/31,864.05 = 13,018.39/x
3. Step 3: Cross multiply
   23,089.86x = 31,864.05 × 13,018.39
4. Step 4: Simplify right side
   23,089.86x = 414,818,550.22
5. Step 5: Solve for x
   x = 414,818,550.22/23,089.86
6. Step 6: Final answer
   x = 17,965.40