Finding the Fourth Proportional to 30,865.42, 42,592.07 and 18,119.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,865.42 : 42,592.07 = 18,119.12 : x
2. Step 2: Convert to fraction form
   30,865.42/42,592.07 = 18,119.12/x
3. Step 3: Cross multiply
   30,865.42x = 42,592.07 × 18,119.12
4. Step 4: Simplify right side
   30,865.42x = 771,730,736.78
5. Step 5: Solve for x
   x = 771,730,736.78/30,865.42
6. Step 6: Final answer
   x = 25,003.09