Finding the Fourth Proportional to 48,309, 72,469.98 and 20,613.48

Step by Step Solution

1. Step 1: Write the proportion equation
   48,309 : 72,469.98 = 20,613.48 : x
2. Step 2: Convert to fraction form
   48,309/72,469.98 = 20,613.48/x
3. Step 3: Cross multiply
   48,309x = 72,469.98 × 20,613.48
4. Step 4: Simplify right side
   48,309x = 1,493,858,483.33
5. Step 5: Solve for x
   x = 1,493,858,483.33/48,309
6. Step 6: Final answer
   x = 30,922.99