Finding the Fourth Proportional to 1,681.16, 2,521.83 and 448.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.16 : 2,521.83 = 448.69 : x
2. Step 2: Convert to fraction form
   1,681.16/2,521.83 = 448.69/x
3. Step 3: Cross multiply
   1,681.16x = 2,521.83 × 448.69
4. Step 4: Simplify right side
   1,681.16x = 1,131,520.01
5. Step 5: Solve for x
   x = 1,131,520.01/1,681.16
6. Step 6: Final answer
   x = 673.06