Finding the Fourth Proportional to 21,945.35, 30,284.73 and 12,387.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945.35 : 30,284.73 = 12,387.56 : x
2. Step 2: Convert to fraction form
   21,945.35/30,284.73 = 12,387.56/x
3. Step 3: Cross multiply
   21,945.35x = 30,284.73 × 12,387.56
4. Step 4: Simplify right side
   21,945.35x = 375,153,758.54
5. Step 5: Solve for x
   x = 375,153,758.54/21,945.35
6. Step 6: Final answer
   x = 17,094.91