Finding the Fourth Proportional to 1,730.72, 2,388.09 and 1,643.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,730.72 : 2,388.09 = 1,643.15 : x
2. Step 2: Convert to fraction form
   1,730.72/2,388.09 = 1,643.15/x
3. Step 3: Cross multiply
   1,730.72x = 2,388.09 × 1,643.15
4. Step 4: Simplify right side
   1,730.72x = 3,923,978.14
5. Step 5: Solve for x
   x = 3,923,978.14/1,730.72
6. Step 6: Final answer
   x = 2,267.26