Finding the Fourth Proportional to 23,018.79, 31,765.61 and 12,947.22

Step by Step Solution

1. Step 1: Write the proportion equation
   23,018.79 : 31,765.61 = 12,947.22 : x
2. Step 2: Convert to fraction form
   23,018.79/31,765.61 = 12,947.22/x
3. Step 3: Cross multiply
   23,018.79x = 31,765.61 × 12,947.22
4. Step 4: Simplify right side
   23,018.79x = 411,276,341.10
5. Step 5: Solve for x
   x = 411,276,341.10/23,018.79
6. Step 6: Final answer
   x = 17,866.98