Finding the Fourth Proportional to 72,399.38, 108,599.16 and 19,809.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,399.38 : 108,599.16 = 19,809.32 : x
2. Step 2: Convert to fraction form
   72,399.38/108,599.16 = 19,809.32/x
3. Step 3: Cross multiply
   72,399.38x = 108,599.16 × 19,809.32
4. Step 4: Simplify right side
   72,399.38x = 2,151,275,512.17
5. Step 5: Solve for x
   x = 2,151,275,512.17/72,399.38
6. Step 6: Final answer
   x = 29,714.00