Finding the Fourth Proportional to 1,644.42, 2,467.86 and 779.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.42 : 2,467.86 = 779.34 : x
2. Step 2: Convert to fraction form
   1,644.42/2,467.86 = 779.34/x
3. Step 3: Cross multiply
   1,644.42x = 2,467.86 × 779.34
4. Step 4: Simplify right side
   1,644.42x = 1,923,302.01
5. Step 5: Solve for x
   x = 1,923,302.01/1,644.42
6. Step 6: Final answer
   x = 1,169.59