Finding the Fourth Proportional to 72,456.56, 108,716 and 39,200

Step by Step Solution

1. Step 1: Write the proportion equation
   72,456.56 : 108,716 = 39,200 : x
2. Step 2: Convert to fraction form
   72,456.56/108,716 = 39,200/x
3. Step 3: Cross multiply
   72,456.56x = 108,716 × 39,200
4. Step 4: Simplify right side
   72,456.56x = 4,261,667,200
5. Step 5: Solve for x
   x = 4,261,667,200/72,456.56
6. Step 6: Final answer
   x = 58,816.86