Finding the Fourth Proportional to 22,978.54, 31,686.35 and 18,190.83

Step by Step Solution

1. Step 1: Write the proportion equation
   22,978.54 : 31,686.35 = 18,190.83 : x
2. Step 2: Convert to fraction form
   22,978.54/31,686.35 = 18,190.83/x
3. Step 3: Cross multiply
   22,978.54x = 31,686.35 × 18,190.83
4. Step 4: Simplify right side
   22,978.54x = 576,401,006.17
5. Step 5: Solve for x
   x = 576,401,006.17/22,978.54
6. Step 6: Final answer
   x = 25,084.32