Finding the Fourth Proportional to 72,406.72, 99,921.18 and 40,575.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.72 : 99,921.18 = 40,575.84 : x
2. Step 2: Convert to fraction form
   72,406.72/99,921.18 = 40,575.84/x
3. Step 3: Cross multiply
   72,406.72x = 99,921.18 × 40,575.84
4. Step 4: Simplify right side
   72,406.72x = 4,054,385,812.29
5. Step 5: Solve for x
   x = 4,054,385,812.29/72,406.72
6. Step 6: Final answer
   x = 55,994.61