Finding the Fourth Proportional to 23,018.74, 31,765.17 and 12,947.74

Step by Step Solution

1. Step 1: Write the proportion equation
   23,018.74 : 31,765.17 = 12,947.74 : x
2. Step 2: Convert to fraction form
   23,018.74/31,765.17 = 12,947.74/x
3. Step 3: Cross multiply
   23,018.74x = 31,765.17 × 12,947.74
4. Step 4: Simplify right side
   23,018.74x = 411,287,162.22
5. Step 5: Solve for x
   x = 411,287,162.22/23,018.74
6. Step 6: Final answer
   x = 17,867.49