Finding the Fourth Proportional to 1,643.90, 2,239.62 and 1,610.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.90 : 2,239.62 = 1,610.18 : x
2. Step 2: Convert to fraction form
   1,643.90/2,239.62 = 1,610.18/x
3. Step 3: Cross multiply
   1,643.90x = 2,239.62 × 1,610.18
4. Step 4: Simplify right side
   1,643.90x = 3,606,196.08
5. Step 5: Solve for x
   x = 3,606,196.08/1,643.90
6. Step 6: Final answer
   x = 2,193.69