Finding the Fourth Proportional to 30,970.28, 42,742.82 and 18,395.08

Step by Step Solution

1. Step 1: Write the proportion equation
   30,970.28 : 42,742.82 = 18,395.08 : x
2. Step 2: Convert to fraction form
   30,970.28/42,742.82 = 18,395.08/x
3. Step 3: Cross multiply
   30,970.28x = 42,742.82 × 18,395.08
4. Step 4: Simplify right side
   30,970.28x = 786,257,593.33
5. Step 5: Solve for x
   x = 786,257,593.33/30,970.28
6. Step 6: Final answer
   x = 25,387.49