Finding the Fourth Proportional to 72,004.59, 99,365.58 and 39,739.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,004.59 : 99,365.58 = 39,739.50 : x
2. Step 2: Convert to fraction form
   72,004.59/99,365.58 = 39,739.50/x
3. Step 3: Cross multiply
   72,004.59x = 99,365.58 × 39,739.50
4. Step 4: Simplify right side
   72,004.59x = 3,948,738,466.41
5. Step 5: Solve for x
   x = 3,948,738,466.41/72,004.59
6. Step 6: Final answer
   x = 54,840.09