Finding the Fourth Proportional to 23,180.37, 31,988.70 and 13,108.77

Step by Step Solution

1. Step 1: Write the proportion equation
   23,180.37 : 31,988.70 = 13,108.77 : x
2. Step 2: Convert to fraction form
   23,180.37/31,988.70 = 13,108.77/x
3. Step 3: Cross multiply
   23,180.37x = 31,988.70 × 13,108.77
4. Step 4: Simplify right side
   23,180.37x = 419,332,510.90
5. Step 5: Solve for x
   x = 419,332,510.90/23,180.37
6. Step 6: Final answer
   x = 18,089.99