Finding the Fourth Proportional to 72,406.46, 99,919.94 and 40,575.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.46 : 99,919.94 = 40,575.98 : x
2. Step 2: Convert to fraction form
   72,406.46/99,919.94 = 40,575.98/x
3. Step 3: Cross multiply
   72,406.46x = 99,919.94 × 40,575.98
4. Step 4: Simplify right side
   72,406.46x = 4,054,349,487.04
5. Step 5: Solve for x
   x = 4,054,349,487.04/72,406.46
6. Step 6: Final answer
   x = 55,994.31