Finding the Fourth Proportional to 72,940.37, 109,429 and 20,349.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,940.37 : 109,429 = 20,349.82 : x
2. Step 2: Convert to fraction form
   72,940.37/109,429 = 20,349.82/x
3. Step 3: Cross multiply
   72,940.37x = 109,429 × 20,349.82
4. Step 4: Simplify right side
   72,940.37x = 2,226,859,905.64
5. Step 5: Solve for x
   x = 2,226,859,905.64/72,940.37
6. Step 6: Final answer
   x = 30,529.87