Finding the Fourth Proportional to 72,929.34, 109,412.48 and 20,338.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,929.34 : 109,412.48 = 20,338.83 : x
2. Step 2: Convert to fraction form
   72,929.34/109,412.48 = 20,338.83/x
3. Step 3: Cross multiply
   72,929.34x = 109,412.48 × 20,338.83
4. Step 4: Simplify right side
   72,929.34x = 2,225,321,728.90
5. Step 5: Solve for x
   x = 2,225,321,728.90/72,929.34
6. Step 6: Final answer
   x = 30,513.39