Finding the Fourth Proportional to 21,200.76, 29,284.61 and 16,134.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,200.76 : 29,284.61 = 16,134.21 : x
2. Step 2: Convert to fraction form
   21,200.76/29,284.61 = 16,134.21/x
3. Step 3: Cross multiply
   21,200.76x = 29,284.61 × 16,134.21
4. Step 4: Simplify right side
   21,200.76x = 472,483,966.84
5. Step 5: Solve for x
   x = 472,483,966.84/21,200.76
6. Step 6: Final answer
   x = 22,286.18