Finding the Fourth Proportional to 31,616.21, 43,650.71 and 20,290.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,616.21 : 43,650.71 = 20,290.59 : x
2. Step 2: Convert to fraction form
   31,616.21/43,650.71 = 20,290.59/x
3. Step 3: Cross multiply
   31,616.21x = 43,650.71 × 20,290.59
4. Step 4: Simplify right side
   31,616.21x = 885,698,659.82
5. Step 5: Solve for x
   x = 885,698,659.82/31,616.21
6. Step 6: Final answer
   x = 28,014.07