Finding the Fourth Proportional to 72,439.68, 99,941.76 and 40,604.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,439.68 : 99,941.76 = 40,604.16 : x
2. Step 2: Convert to fraction form
   72,439.68/99,941.76 = 40,604.16/x
3. Step 3: Cross multiply
   72,439.68x = 99,941.76 × 40,604.16
4. Step 4: Simplify right side
   72,439.68x = 4,058,051,213.72
5. Step 5: Solve for x
   x = 4,058,051,213.72/72,439.68
6. Step 6: Final answer
   x = 56,019.73