Finding the Fourth Proportional to 80,781.34, 121,162.72 and 21,621.62

Step by Step Solution

1. Step 1: Write the proportion equation
   80,781.34 : 121,162.72 = 21,621.62 : x
2. Step 2: Convert to fraction form
   80,781.34/121,162.72 = 21,621.62/x
3. Step 3: Cross multiply
   80,781.34x = 121,162.72 × 21,621.62
4. Step 4: Simplify right side
   80,781.34x = 2,619,734,290.01
5. Step 5: Solve for x
   x = 2,619,734,290.01/80,781.34
6. Step 6: Final answer
   x = 32,429.94