Finding the Fourth Proportional to 30,613.73, 42,251.56 and 18,683.99

Step by Step Solution

1. Step 1: Write the proportion equation
   30,613.73 : 42,251.56 = 18,683.99 : x
2. Step 2: Convert to fraction form
   30,613.73/42,251.56 = 18,683.99/x
3. Step 3: Cross multiply
   30,613.73x = 42,251.56 × 18,683.99
4. Step 4: Simplify right side
   30,613.73x = 789,427,496.17
5. Step 5: Solve for x
   x = 789,427,496.17/30,613.73
6. Step 6: Final answer
   x = 25,786.72