Finding the Fourth Proportional to 72,728.89, 109,105.58 and 37,205.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,728.89 : 109,105.58 = 37,205.60 : x
2. Step 2: Convert to fraction form
   72,728.89/109,105.58 = 37,205.60/x
3. Step 3: Cross multiply
   72,728.89x = 109,105.58 × 37,205.60
4. Step 4: Simplify right side
   72,728.89x = 4,059,338,114.73
5. Step 5: Solve for x
   x = 4,059,338,114.73/72,728.89
6. Step 6: Final answer
   x = 55,814.66