Finding the Fourth Proportional to 30,994.47, 42,757.34 and 18,410.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,994.47 : 42,757.34 = 18,410.31 : x
2. Step 2: Convert to fraction form
   30,994.47/42,757.34 = 18,410.31/x
3. Step 3: Cross multiply
   30,994.47x = 42,757.34 × 18,410.31
4. Step 4: Simplify right side
   30,994.47x = 787,175,792.12
5. Step 5: Solve for x
   x = 787,175,792.12/30,994.47
6. Step 6: Final answer
   x = 25,397.30