Finding the Fourth Proportional to 72,410.94, 99,921.62 and 40,573.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,410.94 : 99,921.62 = 40,573.68 : x
2. Step 2: Convert to fraction form
   72,410.94/99,921.62 = 40,573.68/x
3. Step 3: Cross multiply
   72,410.94x = 99,921.62 × 40,573.68
4. Step 4: Simplify right side
   72,410.94x = 4,054,187,834.96
5. Step 5: Solve for x
   x = 4,054,187,834.96/72,410.94
6. Step 6: Final answer
   x = 55,988.61