Finding the Fourth Proportional to 21,119.85, 29,111.89 and 16,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,119.85 : 29,111.89 = 16,636.50 : x
2. Step 2: Convert to fraction form
   21,119.85/29,111.89 = 16,636.50/x
3. Step 3: Cross multiply
   21,119.85x = 29,111.89 × 16,636.50
4. Step 4: Simplify right side
   21,119.85x = 484,319,957.99
5. Step 5: Solve for x
   x = 484,319,957.99/21,119.85
6. Step 6: Final answer
   x = 22,931.98