Finding the Fourth Proportional to 21,947.67, 30,279.60 and 14,398.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,947.67 : 30,279.60 = 14,398.18 : x
2. Step 2: Convert to fraction form
   21,947.67/30,279.60 = 14,398.18/x
3. Step 3: Cross multiply
   21,947.67x = 30,279.60 × 14,398.18
4. Step 4: Simplify right side
   21,947.67x = 435,971,055.43
5. Step 5: Solve for x
   x = 435,971,055.43/21,947.67
6. Step 6: Final answer
   x = 19,864.12