Finding the Fourth Proportional to 21,917.04, 30,244.77 and 12,483.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,917.04 : 30,244.77 = 12,483.78 : x
2. Step 2: Convert to fraction form
   21,917.04/30,244.77 = 12,483.78/x
3. Step 3: Cross multiply
   21,917.04x = 30,244.77 × 12,483.78
4. Step 4: Simplify right side
   21,917.04x = 377,569,054.83
5. Step 5: Solve for x
   x = 377,569,054.83/21,917.04
6. Step 6: Final answer
   x = 17,227.19