Finding the Fourth Proportional to 72,213.73, 99,664.23 and 40,384.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,213.73 : 99,664.23 = 40,384.42 : x
2. Step 2: Convert to fraction form
   72,213.73/99,664.23 = 40,384.42/x
3. Step 3: Cross multiply
   72,213.73x = 99,664.23 × 40,384.42
4. Step 4: Simplify right side
   72,213.73x = 4,024,882,123.30
5. Step 5: Solve for x
   x = 4,024,882,123.30/72,213.73
6. Step 6: Final answer
   x = 55,735.69