Finding the Fourth Proportional to 30,806.01, 42,492.72 and 20,196.33

Step by Step Solution

1. Step 1: Write the proportion equation
   30,806.01 : 42,492.72 = 20,196.33 : x
2. Step 2: Convert to fraction form
   30,806.01/42,492.72 = 20,196.33/x
3. Step 3: Cross multiply
   30,806.01x = 42,492.72 × 20,196.33
4. Step 4: Simplify right side
   30,806.01x = 858,196,995.72
5. Step 5: Solve for x
   x = 858,196,995.72/30,806.01
6. Step 6: Final answer
   x = 27,858.10