Finding the Fourth Proportional to 72,023.42, 99,392.16 and 40,190.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,023.42 : 99,392.16 = 40,190.42 : x
2. Step 2: Convert to fraction form
   72,023.42/99,392.16 = 40,190.42/x
3. Step 3: Cross multiply
   72,023.42x = 99,392.16 × 40,190.42
4. Step 4: Simplify right side
   72,023.42x = 3,994,612,655.11
5. Step 5: Solve for x
   x = 3,994,612,655.11/72,023.42
6. Step 6: Final answer
   x = 55,462.69