Finding the Fourth Proportional to 72,404.55, 99,912.83 and 40,567.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,404.55 : 99,912.83 = 40,567.30 : x
2. Step 2: Convert to fraction form
   72,404.55/99,912.83 = 40,567.30/x
3. Step 3: Cross multiply
   72,404.55x = 99,912.83 × 40,567.30
4. Step 4: Simplify right side
   72,404.55x = 4,053,193,295.84
5. Step 5: Solve for x
   x = 4,053,193,295.84/72,404.55
6. Step 6: Final answer
   x = 55,979.81