Finding the Fourth Proportional to 21,805.74, 30,092.85 and 12,375.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,805.74 : 30,092.85 = 12,375.18 : x
2. Step 2: Convert to fraction form
   21,805.74/30,092.85 = 12,375.18/x
3. Step 3: Cross multiply
   21,805.74x = 30,092.85 × 12,375.18
4. Step 4: Simplify right side
   21,805.74x = 372,404,435.46
5. Step 5: Solve for x
   x = 372,404,435.46/21,805.74
6. Step 6: Final answer
   x = 17,078.28