Finding the Fourth Proportional to 1,671.34, 2,505.32 and 805.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.34 : 2,505.32 = 805.18 : x
2. Step 2: Convert to fraction form
   1,671.34/2,505.32 = 805.18/x
3. Step 3: Cross multiply
   1,671.34x = 2,505.32 × 805.18
4. Step 4: Simplify right side
   1,671.34x = 2,017,233.56
5. Step 5: Solve for x
   x = 2,017,233.56/1,671.34
6. Step 6: Final answer
   x = 1,206.96