Finding the Fourth Proportional to 21,977.82, 30,329.10 and 12,546.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,977.82 : 30,329.10 = 12,546.18 : x
2. Step 2: Convert to fraction form
   21,977.82/30,329.10 = 12,546.18/x
3. Step 3: Cross multiply
   21,977.82x = 30,329.10 × 12,546.18
4. Step 4: Simplify right side
   21,977.82x = 380,514,347.84
5. Step 5: Solve for x
   x = 380,514,347.84/21,977.82
6. Step 6: Final answer
   x = 17,313.56