Finding the Fourth Proportional to 31,422.72, 47,067.84 and 21,515.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,422.72 : 47,067.84 = 21,515.52 : x
2. Step 2: Convert to fraction form
   31,422.72/47,067.84 = 21,515.52/x
3. Step 3: Cross multiply
   31,422.72x = 47,067.84 × 21,515.52
4. Step 4: Simplify right side
   31,422.72x = 1,012,689,052.88
5. Step 5: Solve for x
   x = 1,012,689,052.88/31,422.72
6. Step 6: Final answer
   x = 32,227.92