Finding the Fourth Proportional to 35,978.10, 53,966.79 and 20,183.10

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.10 : 53,966.79 = 20,183.10 : x
2. Step 2: Convert to fraction form
   35,978.10/53,966.79 = 20,183.10/x
3. Step 3: Cross multiply
   35,978.10x = 53,966.79 × 20,183.10
4. Step 4: Simplify right side
   35,978.10x = 1,089,217,119.25
5. Step 5: Solve for x
   x = 1,089,217,119.25/35,978.10
6. Step 6: Final answer
   x = 30,274.45