Finding the Fourth Proportional to 72,069.92, 108,107.31 and 19,479.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,069.92 : 108,107.31 = 19,479.86 : x
2. Step 2: Convert to fraction form
   72,069.92/108,107.31 = 19,479.86/x
3. Step 3: Cross multiply
   72,069.92x = 108,107.31 × 19,479.86
4. Step 4: Simplify right side
   72,069.92x = 2,105,915,263.78
5. Step 5: Solve for x
   x = 2,105,915,263.78/72,069.92
6. Step 6: Final answer
   x = 29,220.45