Finding the Fourth Proportional to 48,411.72, 72,629.90 and 28,438.10

Step by Step Solution

1. Step 1: Write the proportion equation
   48,411.72 : 72,629.90 = 28,438.10 : x
2. Step 2: Convert to fraction form
   48,411.72/72,629.90 = 28,438.10/x
3. Step 3: Cross multiply
   48,411.72x = 72,629.90 × 28,438.10
4. Step 4: Simplify right side
   48,411.72x = 2,065,456,540.76
5. Step 5: Solve for x
   x = 2,065,456,540.76/48,411.72
6. Step 6: Final answer
   x = 42,664.39