Finding the Fourth Proportional to 80,536.88, 120,819.42 and 30,621.30

Step by Step Solution

1. Step 1: Write the proportion equation
   80,536.88 : 120,819.42 = 30,621.30 : x
2. Step 2: Convert to fraction form
   80,536.88/120,819.42 = 30,621.30/x
3. Step 3: Cross multiply
   80,536.88x = 120,819.42 × 30,621.30
4. Step 4: Simplify right side
   80,536.88x = 3,699,647,705.65
5. Step 5: Solve for x
   x = 3,699,647,705.65/80,536.88
6. Step 6: Final answer
   x = 45,937.31