Finding the Fourth Proportional to 21,538.17, 29,722.32 and 12,106.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,538.17 : 29,722.32 = 12,106.71 : x
2. Step 2: Convert to fraction form
   21,538.17/29,722.32 = 12,106.71/x
3. Step 3: Cross multiply
   21,538.17x = 29,722.32 × 12,106.71
4. Step 4: Simplify right side
   21,538.17x = 359,839,508.77
5. Step 5: Solve for x
   x = 359,839,508.77/21,538.17
6. Step 6: Final answer
   x = 16,707.06