Finding the Fourth Proportional to 72,392.46, 99,900.63 and 40,561.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,392.46 : 99,900.63 = 40,561.98 : x
2. Step 2: Convert to fraction form
   72,392.46/99,900.63 = 40,561.98/x
3. Step 3: Cross multiply
   72,392.46x = 99,900.63 × 40,561.98
4. Step 4: Simplify right side
   72,392.46x = 4,052,167,356.05
5. Step 5: Solve for x
   x = 4,052,167,356.05/72,392.46
6. Step 6: Final answer
   x = 55,974.99