Finding the Fourth Proportional to 23,086.49, 31,856.28 and 13,015.35

Step by Step Solution

1. Step 1: Write the proportion equation
   23,086.49 : 31,856.28 = 13,015.35 : x
2. Step 2: Convert to fraction form
   23,086.49/31,856.28 = 13,015.35/x
3. Step 3: Cross multiply
   23,086.49x = 31,856.28 × 13,015.35
4. Step 4: Simplify right side
   23,086.49x = 414,620,633.90
5. Step 5: Solve for x
   x = 414,620,633.90/23,086.49
6. Step 6: Final answer
   x = 17,959.45