Finding the Fourth Proportional to 1,677.34, 2,513.94 and 855.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.34 : 2,513.94 = 855.16 : x
2. Step 2: Convert to fraction form
   1,677.34/2,513.94 = 855.16/x
3. Step 3: Cross multiply
   1,677.34x = 2,513.94 × 855.16
4. Step 4: Simplify right side
   1,677.34x = 2,149,820.93
5. Step 5: Solve for x
   x = 2,149,820.93/1,677.34
6. Step 6: Final answer
   x = 1,281.68