Finding the Fourth Proportional to 22,905.89, 31,609.74 and 12,834.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,905.89 : 31,609.74 = 12,834.30 : x
2. Step 2: Convert to fraction form
   22,905.89/31,609.74 = 12,834.30/x
3. Step 3: Cross multiply
   22,905.89x = 31,609.74 × 12,834.30
4. Step 4: Simplify right side
   22,905.89x = 405,688,837.95
5. Step 5: Solve for x
   x = 405,688,837.95/22,905.89
6. Step 6: Final answer
   x = 17,711.11