Finding the Fourth Proportional to 20,936.72, 31,406.16 and 5,354.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,936.72 : 31,406.16 = 5,354.48 : x
2. Step 2: Convert to fraction form
   20,936.72/31,406.16 = 5,354.48/x
3. Step 3: Cross multiply
   20,936.72x = 31,406.16 × 5,354.48
4. Step 4: Simplify right side
   20,936.72x = 168,163,655.60
5. Step 5: Solve for x
   x = 168,163,655.60/20,936.72
6. Step 6: Final answer
   x = 8,032.00