Finding the Fourth Proportional to 72,697.92, 109,047.94 and 19,391

Step by Step Solution

1. Step 1: Write the proportion equation
   72,697.92 : 109,047.94 = 19,391 : x
2. Step 2: Convert to fraction form
   72,697.92/109,047.94 = 19,391/x
3. Step 3: Cross multiply
   72,697.92x = 109,047.94 × 19,391
4. Step 4: Simplify right side
   72,697.92x = 2,114,548,604.54
5. Step 5: Solve for x
   x = 2,114,548,604.54/72,697.92
6. Step 6: Final answer
   x = 29,086.78