Finding the Fourth Proportional to 72,710.27, 109,067.83 and 20,115.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,710.27 : 109,067.83 = 20,115.35 : x
2. Step 2: Convert to fraction form
   72,710.27/109,067.83 = 20,115.35/x
3. Step 3: Cross multiply
   72,710.27x = 109,067.83 × 20,115.35
4. Step 4: Simplify right side
   72,710.27x = 2,193,937,574.19
5. Step 5: Solve for x
   x = 2,193,937,574.19/72,710.27
6. Step 6: Final answer
   x = 30,173.70