Finding the Fourth Proportional to 3,180.78, 4,769.33 and 1,230.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,180.78 : 4,769.33 = 1,230.71 : x
2. Step 2: Convert to fraction form
   3,180.78/4,769.33 = 1,230.71/x
3. Step 3: Cross multiply
   3,180.78x = 4,769.33 × 1,230.71
4. Step 4: Simplify right side
   3,180.78x = 5,869,632.12
5. Step 5: Solve for x
   x = 5,869,632.12/3,180.78
6. Step 6: Final answer
   x = 1,845.34