Finding the Fourth Proportional to 72,205.56, 99,630.81 and 40,374.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,205.56 : 99,630.81 = 40,374.72 : x
2. Step 2: Convert to fraction form
   72,205.56/99,630.81 = 40,374.72/x
3. Step 3: Cross multiply
   72,205.56x = 99,630.81 × 40,374.72
4. Step 4: Simplify right side
   72,205.56x = 4,022,566,057.12
5. Step 5: Solve for x
   x = 4,022,566,057.12/72,205.56
6. Step 6: Final answer
   x = 55,709.92