Finding the Fourth Proportional to 21,927, 30,258.46 and 12,493.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,927 : 30,258.46 = 12,493.74 : x
2. Step 2: Convert to fraction form
   21,927/30,258.46 = 12,493.74/x
3. Step 3: Cross multiply
   21,927x = 30,258.46 × 12,493.74
4. Step 4: Simplify right side
   21,927x = 378,041,332.04
5. Step 5: Solve for x
   x = 378,041,332.04/21,927
6. Step 6: Final answer
   x = 17,240.91