Finding the Fourth Proportional to 52,239.20, 72,091.53 and 30,730.50

Step by Step Solution

1. Step 1: Write the proportion equation
   52,239.20 : 72,091.53 = 30,730.50 : x
2. Step 2: Convert to fraction form
   52,239.20/72,091.53 = 30,730.50/x
3. Step 3: Cross multiply
   52,239.20x = 72,091.53 × 30,730.50
4. Step 4: Simplify right side
   52,239.20x = 2,215,408,762.67
5. Step 5: Solve for x
   x = 2,215,408,762.67/52,239.20
6. Step 6: Final answer
   x = 42,408.94