Finding the Fourth Proportional to 22,416.50, 30,934.17 and 12,858

Step by Step Solution

1. Step 1: Write the proportion equation
   22,416.50 : 30,934.17 = 12,858 : x
2. Step 2: Convert to fraction form
   22,416.50/30,934.17 = 12,858/x
3. Step 3: Cross multiply
   22,416.50x = 30,934.17 × 12,858
4. Step 4: Simplify right side
   22,416.50x = 397,751,557.86
5. Step 5: Solve for x
   x = 397,751,557.86/22,416.50
6. Step 6: Final answer
   x = 17,743.70