Finding the Fourth Proportional to 30,740.79, 42,145.78 and 30,180.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,740.79 : 42,145.78 = 30,180.37 : x
2. Step 2: Convert to fraction form
   30,740.79/42,145.78 = 30,180.37/x
3. Step 3: Cross multiply
   30,740.79x = 42,145.78 × 30,180.37
4. Step 4: Simplify right side
   30,740.79x = 1,271,975,234.34
5. Step 5: Solve for x
   x = 1,271,975,234.34/30,740.79
6. Step 6: Final answer
   x = 41,377.44