Finding the Fourth Proportional to 1,643.83, 2,272.86 and 1,436.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.83 : 2,272.86 = 1,436.33 : x
2. Step 2: Convert to fraction form
   1,643.83/2,272.86 = 1,436.33/x
3. Step 3: Cross multiply
   1,643.83x = 2,272.86 × 1,436.33
4. Step 4: Simplify right side
   1,643.83x = 3,264,577.00
5. Step 5: Solve for x
   x = 3,264,577.00/1,643.83
6. Step 6: Final answer
   x = 1,985.96