Finding the Fourth Proportional to 22,959, 31,683.30 and 12,887.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,959 : 31,683.30 = 12,887.46 : x
2. Step 2: Convert to fraction form
   22,959/31,683.30 = 12,887.46/x
3. Step 3: Cross multiply
   22,959x = 31,683.30 × 12,887.46
4. Step 4: Simplify right side
   22,959x = 408,317,261.42
5. Step 5: Solve for x
   x = 408,317,261.42/22,959
6. Step 6: Final answer
   x = 17,784.63