Finding the Fourth Proportional to 72,429.80, 108,675.68 and 30,319.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,429.80 : 108,675.68 = 30,319.72 : x
2. Step 2: Convert to fraction form
   72,429.80/108,675.68 = 30,319.72/x
3. Step 3: Cross multiply
   72,429.80x = 108,675.68 × 30,319.72
4. Step 4: Simplify right side
   72,429.80x = 3,295,015,765.12
5. Step 5: Solve for x
   x = 3,295,015,765.12/72,429.80
6. Step 6: Final answer
   x = 45,492.55