Finding the Fourth Proportional to 1,641.69, 2,462.52 and 667.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.69 : 2,462.52 = 667.77 : x
2. Step 2: Convert to fraction form
   1,641.69/2,462.52 = 667.77/x
3. Step 3: Cross multiply
   1,641.69x = 2,462.52 × 667.77
4. Step 4: Simplify right side
   1,641.69x = 1,644,396.98
5. Step 5: Solve for x
   x = 1,644,396.98/1,641.69
6. Step 6: Final answer
   x = 1,001.65