Finding the Fourth Proportional to 1,095.32, 1,643.00 and 445.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.32 : 1,643.00 = 445.65 : x
2. Step 2: Convert to fraction form
   1,095.32/1,643.00 = 445.65/x
3. Step 3: Cross multiply
   1,095.32x = 1,643.00 × 445.65
4. Step 4: Simplify right side
   1,095.32x = 732,200.72
5. Step 5: Solve for x
   x = 732,200.72/1,095.32
6. Step 6: Final answer
   x = 668.48