Finding the Fourth Proportional to 35,399.12, 53,083.82 and 20,618.24

Step by Step Solution

1. Step 1: Write the proportion equation
   35,399.12 : 53,083.82 = 20,618.24 : x
2. Step 2: Convert to fraction form
   35,399.12/53,083.82 = 20,618.24/x
3. Step 3: Cross multiply
   35,399.12x = 53,083.82 × 20,618.24
4. Step 4: Simplify right side
   35,399.12x = 1,094,494,940.88
5. Step 5: Solve for x
   x = 1,094,494,940.88/35,399.12
6. Step 6: Final answer
   x = 30,918.70