Finding the Fourth Proportional to 39,701.72, 54,788.83 and 21,796.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,701.72 : 54,788.83 = 21,796.34 : x
2. Step 2: Convert to fraction form
   39,701.72/54,788.83 = 21,796.34/x
3. Step 3: Cross multiply
   39,701.72x = 54,788.83 × 21,796.34
4. Step 4: Simplify right side
   39,701.72x = 1,194,196,007.94
5. Step 5: Solve for x
   x = 1,194,196,007.94/39,701.72
6. Step 6: Final answer
   x = 30,079.20