Finding the Fourth Proportional to 3,061.38, 4,589.48 and 1,213.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.38 : 4,589.48 = 1,213.80 : x
2. Step 2: Convert to fraction form
   3,061.38/4,589.48 = 1,213.80/x
3. Step 3: Cross multiply
   3,061.38x = 4,589.48 × 1,213.80
4. Step 4: Simplify right side
   3,061.38x = 5,570,704.76
5. Step 5: Solve for x
   x = 5,570,704.76/3,061.38
6. Step 6: Final answer
   x = 1,819.67