Finding the Fourth Proportional to 20,796.72, 31,196.04 and 5,214.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,796.72 : 31,196.04 = 5,214.48 : x
2. Step 2: Convert to fraction form
   20,796.72/31,196.04 = 5,214.48/x
3. Step 3: Cross multiply
   20,796.72x = 31,196.04 × 5,214.48
4. Step 4: Simplify right side
   20,796.72x = 162,671,126.66
5. Step 5: Solve for x
   x = 162,671,126.66/20,796.72
6. Step 6: Final answer
   x = 7,821.96