Finding the Fourth Proportional to 21,908.82, 32,868.42 and 7,117.74

Step by Step Solution

1. Step 1: Write the proportion equation
   21,908.82 : 32,868.42 = 7,117.74 : x
2. Step 2: Convert to fraction form
   21,908.82/32,868.42 = 7,117.74/x
3. Step 3: Cross multiply
   21,908.82x = 32,868.42 × 7,117.74
4. Step 4: Simplify right side
   21,908.82x = 233,948,867.77
5. Step 5: Solve for x
   x = 233,948,867.77/21,908.82
6. Step 6: Final answer
   x = 10,678.30