Finding the Fourth Proportional to 20,922.72, 31,385.16 and 5,340.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,922.72 : 31,385.16 = 5,340.48 : x
2. Step 2: Convert to fraction form
   20,922.72/31,385.16 = 5,340.48/x
3. Step 3: Cross multiply
   20,922.72x = 31,385.16 × 5,340.48
4. Step 4: Simplify right side
   20,922.72x = 167,611,819.28
5. Step 5: Solve for x
   x = 167,611,819.28/20,922.72
6. Step 6: Final answer
   x = 8,011.00