Finding the Fourth Proportional to 21,642.52, 29,868.16 and 12,084.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,642.52 : 29,868.16 = 12,084.28 : x
2. Step 2: Convert to fraction form
   21,642.52/29,868.16 = 12,084.28/x
3. Step 3: Cross multiply
   21,642.52x = 29,868.16 × 12,084.28
4. Step 4: Simplify right side
   21,642.52x = 360,935,208.52
5. Step 5: Solve for x
   x = 360,935,208.52/21,642.52
6. Step 6: Final answer
   x = 16,677.13