Finding the Fourth Proportional to 30,613.10, 42,245 and 18,696.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,613.10 : 42,245 = 18,696.38 : x
2. Step 2: Convert to fraction form
   30,613.10/42,245 = 18,696.38/x
3. Step 3: Cross multiply
   30,613.10x = 42,245 × 18,696.38
4. Step 4: Simplify right side
   30,613.10x = 789,828,573.10
5. Step 5: Solve for x
   x = 789,828,573.10/30,613.10
6. Step 6: Final answer
   x = 25,800.35