Finding the Fourth Proportional to 48,912.42, 67,498.20 and 28,771.50

Step by Step Solution

1. Step 1: Write the proportion equation
   48,912.42 : 67,498.20 = 28,771.50 : x
2. Step 2: Convert to fraction form
   48,912.42/67,498.20 = 28,771.50/x
3. Step 3: Cross multiply
   48,912.42x = 67,498.20 × 28,771.50
4. Step 4: Simplify right side
   48,912.42x = 1,942,024,461.30
5. Step 5: Solve for x
   x = 1,942,024,461.30/48,912.42
6. Step 6: Final answer
   x = 39,704.12