Finding the Fourth Proportional to 23,009.55, 31,755.99 and 12,938.41

Step by Step Solution

1. Step 1: Write the proportion equation
   23,009.55 : 31,755.99 = 12,938.41 : x
2. Step 2: Convert to fraction form
   23,009.55/31,755.99 = 12,938.41/x
3. Step 3: Cross multiply
   23,009.55x = 31,755.99 × 12,938.41
4. Step 4: Simplify right side
   23,009.55x = 410,872,018.58
5. Step 5: Solve for x
   x = 410,872,018.58/23,009.55
6. Step 6: Final answer
   x = 17,856.59