Finding the Fourth Proportional to 21,106.74, 31,661.78 and 7,066.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,106.74 : 31,661.78 = 7,066.84 : x
2. Step 2: Convert to fraction form
   21,106.74/31,661.78 = 7,066.84/x
3. Step 3: Cross multiply
   21,106.74x = 31,661.78 × 7,066.84
4. Step 4: Simplify right side
   21,106.74x = 223,748,733.38
5. Step 5: Solve for x
   x = 223,748,733.38/21,106.74
6. Step 6: Final answer
   x = 10,600.82