Finding the Fourth Proportional to 21,209.83, 31,814.82 and 7,169.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,209.83 : 31,814.82 = 7,169.96 : x
2. Step 2: Convert to fraction form
   21,209.83/31,814.82 = 7,169.96/x
3. Step 3: Cross multiply
   21,209.83x = 31,814.82 × 7,169.96
4. Step 4: Simplify right side
   21,209.83x = 228,111,066.34
5. Step 5: Solve for x
   x = 228,111,066.34/21,209.83
6. Step 6: Final answer
   x = 10,754.97