Finding the Fourth Proportional to 72,992.10, 100,728.82 and 39,458.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,992.10 : 100,728.82 = 39,458.10 : x
2. Step 2: Convert to fraction form
   72,992.10/100,728.82 = 39,458.10/x
3. Step 3: Cross multiply
   72,992.10x = 100,728.82 × 39,458.10
4. Step 4: Simplify right side
   72,992.10x = 3,974,567,250.15
5. Step 5: Solve for x
   x = 3,974,567,250.15/72,992.10
6. Step 6: Final answer
   x = 54,452.02