Finding the Fourth Proportional to 21,109.11, 31,664.06 and 7,066.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,109.11 : 31,664.06 = 7,066.52 : x
2. Step 2: Convert to fraction form
   21,109.11/31,664.06 = 7,066.52/x
3. Step 3: Cross multiply
   21,109.11x = 31,664.06 × 7,066.52
4. Step 4: Simplify right side
   21,109.11x = 223,754,823.09
5. Step 5: Solve for x
   x = 223,754,823.09/21,109.11
6. Step 6: Final answer
   x = 10,599.92