Finding the Fourth Proportional to 37,638.56, 51,940.56 and 20,871.68

Step by Step Solution

1. Step 1: Write the proportion equation
   37,638.56 : 51,940.56 = 20,871.68 : x
2. Step 2: Convert to fraction form
   37,638.56/51,940.56 = 20,871.68/x
3. Step 3: Cross multiply
   37,638.56x = 51,940.56 × 20,871.68
4. Step 4: Simplify right side
   37,638.56x = 1,084,086,747.34
5. Step 5: Solve for x
   x = 1,084,086,747.34/37,638.56
6. Step 6: Final answer
   x = 28,802.56