Finding the Fourth Proportional to 2,647.31, 3,970.14 and 1,830.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.31 : 3,970.14 = 1,830.83 : x
2. Step 2: Convert to fraction form
   2,647.31/3,970.14 = 1,830.83/x
3. Step 3: Cross multiply
   2,647.31x = 3,970.14 × 1,830.83
4. Step 4: Simplify right side
   2,647.31x = 7,268,651.42
5. Step 5: Solve for x
   x = 7,268,651.42/2,647.31
6. Step 6: Final answer
   x = 2,745.67