Finding the Fourth Proportional to 1,643.35, 2,267.83 and 1,054.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.35 : 2,267.83 = 1,054.23 : x
2. Step 2: Convert to fraction form
   1,643.35/2,267.83 = 1,054.23/x
3. Step 3: Cross multiply
   1,643.35x = 2,267.83 × 1,054.23
4. Step 4: Simplify right side
   1,643.35x = 2,390,814.42
5. Step 5: Solve for x
   x = 2,390,814.42/1,643.35
6. Step 6: Final answer
   x = 1,454.84