Finding the Fourth Proportional to 21,906.90, 32,864.91 and 7,116.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,906.90 : 32,864.91 = 7,116.12 : x
2. Step 2: Convert to fraction form
   21,906.90/32,864.91 = 7,116.12/x
3. Step 3: Cross multiply
   21,906.90x = 32,864.91 × 7,116.12
4. Step 4: Simplify right side
   21,906.90x = 233,870,643.35
5. Step 5: Solve for x
   x = 233,870,643.35/21,906.90
6. Step 6: Final answer
   x = 10,675.66