Finding the Fourth Proportional to 21,707.82, 29,981.39 and 14,621.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,707.82 : 29,981.39 = 14,621.94 : x
2. Step 2: Convert to fraction form
   21,707.82/29,981.39 = 14,621.94/x
3. Step 3: Cross multiply
   21,707.82x = 29,981.39 × 14,621.94
4. Step 4: Simplify right side
   21,707.82x = 438,386,012.59
5. Step 5: Solve for x
   x = 438,386,012.59/21,707.82
6. Step 6: Final answer
   x = 20,194.84