Finding the Fourth Proportional to 30,936.25, 42,703.10 and 18,361

Step by Step Solution

1. Step 1: Write the proportion equation
   30,936.25 : 42,703.10 = 18,361 : x
2. Step 2: Convert to fraction form
   30,936.25/42,703.10 = 18,361/x
3. Step 3: Cross multiply
   30,936.25x = 42,703.10 × 18,361
4. Step 4: Simplify right side
   30,936.25x = 784,071,619.10
5. Step 5: Solve for x
   x = 784,071,619.10/30,936.25
6. Step 6: Final answer
   x = 25,344.75