Finding the Fourth Proportional to 31,518.72, 47,321.28 and 19,797.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,518.72 : 47,321.28 = 19,797.12 : x
2. Step 2: Convert to fraction form
   31,518.72/47,321.28 = 19,797.12/x
3. Step 3: Cross multiply
   31,518.72x = 47,321.28 × 19,797.12
4. Step 4: Simplify right side
   31,518.72x = 936,825,058.71
5. Step 5: Solve for x
   x = 936,825,058.71/31,518.72
6. Step 6: Final answer
   x = 29,722.81