Finding the Fourth Proportional to 72,407.46, 99,921.32 and 40,576.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,407.46 : 99,921.32 = 40,576.98 : x
2. Step 2: Convert to fraction form
   72,407.46/99,921.32 = 40,576.98/x
3. Step 3: Cross multiply
   72,407.46x = 99,921.32 × 40,576.98
4. Step 4: Simplify right side
   72,407.46x = 4,054,505,403.21
5. Step 5: Solve for x
   x = 4,054,505,403.21/72,407.46
6. Step 6: Final answer
   x = 55,995.69