Finding the Fourth Proportional to 22,681.78, 31,302.78 and 12,612.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,681.78 : 31,302.78 = 12,612.17 : x
2. Step 2: Convert to fraction form
   22,681.78/31,302.78 = 12,612.17/x
3. Step 3: Cross multiply
   22,681.78x = 31,302.78 × 12,612.17
4. Step 4: Simplify right side
   22,681.78x = 394,795,982.83
5. Step 5: Solve for x
   x = 394,795,982.83/22,681.78
6. Step 6: Final answer
   x = 17,405.86