Finding the Fourth Proportional to 21,066.02, 31,604.94 and 9,220.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.02 : 31,604.94 = 9,220.83 : x
2. Step 2: Convert to fraction form
   21,066.02/31,604.94 = 9,220.83/x
3. Step 3: Cross multiply
   21,066.02x = 31,604.94 × 9,220.83
4. Step 4: Simplify right side
   21,066.02x = 291,423,778.90
5. Step 5: Solve for x
   x = 291,423,778.90/21,066.02
6. Step 6: Final answer
   x = 13,833.83