Finding the Fourth Proportional to 2,380.62, 3,570.57 and 1,147.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.62 : 3,570.57 = 1,147.71 : x
2. Step 2: Convert to fraction form
   2,380.62/3,570.57 = 1,147.71/x
3. Step 3: Cross multiply
   2,380.62x = 3,570.57 × 1,147.71
4. Step 4: Simplify right side
   2,380.62x = 4,097,978.89
5. Step 5: Solve for x
   x = 4,097,978.89/2,380.62
6. Step 6: Final answer
   x = 1,721.39