Finding the Fourth Proportional to 1,615.82, 2,423.72 and 445.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.82 : 2,423.72 = 445.83 : x
2. Step 2: Convert to fraction form
   1,615.82/2,423.72 = 445.83/x
3. Step 3: Cross multiply
   1,615.82x = 2,423.72 × 445.83
4. Step 4: Simplify right side
   1,615.82x = 1,080,564.86
5. Step 5: Solve for x
   x = 1,080,564.86/1,615.82
6. Step 6: Final answer
   x = 668.74