Finding the Fourth Proportional to 21,074.83, 31,458.50 and 18,414.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,074.83 : 31,458.50 = 18,414.60 : x
2. Step 2: Convert to fraction form
   21,074.83/31,458.50 = 18,414.60/x
3. Step 3: Cross multiply
   21,074.83x = 31,458.50 × 18,414.60
4. Step 4: Simplify right side
   21,074.83x = 579,295,444.73
5. Step 5: Solve for x
   x = 579,295,444.73/21,074.83
6. Step 6: Final answer
   x = 27,487.56