Finding the Fourth Proportional to 21,958.40, 30,314.58 and 15,162.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,958.40 : 30,314.58 = 15,162.50 : x
2. Step 2: Convert to fraction form
   21,958.40/30,314.58 = 15,162.50/x
3. Step 3: Cross multiply
   21,958.40x = 30,314.58 × 15,162.50
4. Step 4: Simplify right side
   21,958.40x = 459,644,819.25
5. Step 5: Solve for x
   x = 459,644,819.25/21,958.40
6. Step 6: Final answer
   x = 20,932.53