Finding the Fourth Proportional to 21,162.42, 31,743.27 and 5,152.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,162.42 : 31,743.27 = 5,152.12 : x
2. Step 2: Convert to fraction form
   21,162.42/31,743.27 = 5,152.12/x
3. Step 3: Cross multiply
   21,162.42x = 31,743.27 × 5,152.12
4. Step 4: Simplify right side
   21,162.42x = 163,545,136.23
5. Step 5: Solve for x
   x = 163,545,136.23/21,162.42
6. Step 6: Final answer
   x = 7,728.09