Finding the Fourth Proportional to 31,179.18, 43,020.15 and 18,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,179.18 : 43,020.15 = 18,601.50 : x
2. Step 2: Convert to fraction form
   31,179.18/43,020.15 = 18,601.50/x
3. Step 3: Cross multiply
   31,179.18x = 43,020.15 × 18,601.50
4. Step 4: Simplify right side
   31,179.18x = 800,239,320.23
5. Step 5: Solve for x
   x = 800,239,320.23/31,179.18
6. Step 6: Final answer
   x = 25,665.82