Finding the Fourth Proportional to 31,215, 43,076.52 and 17,067.90

Step by Step Solution

1. Step 1: Write the proportion equation
   31,215 : 43,076.52 = 17,067.90 : x
2. Step 2: Convert to fraction form
   31,215/43,076.52 = 17,067.90/x
3. Step 3: Cross multiply
   31,215x = 43,076.52 × 17,067.90
4. Step 4: Simplify right side
   31,215x = 735,225,735.71
5. Step 5: Solve for x
   x = 735,225,735.71/31,215
6. Step 6: Final answer
   x = 23,553.60