Finding the Fourth Proportional to 72,682.56, 109,029.60 and 20,091.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,682.56 : 109,029.60 = 20,091.96 : x
2. Step 2: Convert to fraction form
   72,682.56/109,029.60 = 20,091.96/x
3. Step 3: Cross multiply
   72,682.56x = 109,029.60 × 20,091.96
4. Step 4: Simplify right side
   72,682.56x = 2,190,618,362.02
5. Step 5: Solve for x
   x = 2,190,618,362.02/72,682.56
6. Step 6: Final answer
   x = 30,139.53