Finding the Fourth Proportional to 72,194.81, 99,625.55 and 39,929.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,194.81 : 99,625.55 = 39,929.72 : x
2. Step 2: Convert to fraction form
   72,194.81/99,625.55 = 39,929.72/x
3. Step 3: Cross multiply
   72,194.81x = 99,625.55 × 39,929.72
4. Step 4: Simplify right side
   72,194.81x = 3,978,020,365.76
5. Step 5: Solve for x
   x = 3,978,020,365.76/72,194.81
6. Step 6: Final answer
   x = 55,101.19