Finding the Fourth Proportional to 72,451.44, 99,981.72 and 40,620.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,451.44 : 99,981.72 = 40,620.24 : x
2. Step 2: Convert to fraction form
   72,451.44/99,981.72 = 40,620.24/x
3. Step 3: Cross multiply
   72,451.44x = 99,981.72 × 40,620.24
4. Step 4: Simplify right side
   72,451.44x = 4,061,281,462.01
5. Step 5: Solve for x
   x = 4,061,281,462.01/72,451.44
6. Step 6: Final answer
   x = 56,055.22