Finding the Fourth Proportional to 22,210.72, 30,650.82 and 12,781.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,210.72 : 30,650.82 = 12,781.12 : x
2. Step 2: Convert to fraction form
   22,210.72/30,650.82 = 12,781.12/x
3. Step 3: Cross multiply
   22,210.72x = 30,650.82 × 12,781.12
4. Step 4: Simplify right side
   22,210.72x = 391,751,808.52
5. Step 5: Solve for x
   x = 391,751,808.52/22,210.72
6. Step 6: Final answer
   x = 17,637.96