Finding the Fourth Proportional to 72,019.83, 99,392.36 and 40,194.93

Step by Step Solution

1. Step 1: Write the proportion equation
   72,019.83 : 99,392.36 = 40,194.93 : x
2. Step 2: Convert to fraction form
   72,019.83/99,392.36 = 40,194.93/x
3. Step 3: Cross multiply
   72,019.83x = 99,392.36 × 40,194.93
4. Step 4: Simplify right side
   72,019.83x = 3,995,068,751.76
5. Step 5: Solve for x
   x = 3,995,068,751.76/72,019.83
6. Step 6: Final answer
   x = 55,471.79