Finding the Fourth Proportional to 1,095.34, 1,642.23 and 445.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.34 : 1,642.23 = 445.54 : x
2. Step 2: Convert to fraction form
   1,095.34/1,642.23 = 445.54/x
3. Step 3: Cross multiply
   1,095.34x = 1,642.23 × 445.54
4. Step 4: Simplify right side
   1,095.34x = 731,679.15
5. Step 5: Solve for x
   x = 731,679.15/1,095.34
6. Step 6: Final answer
   x = 667.99