Finding the Fourth Proportional to 1,287.67, 1,777.86 and 846.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287.67 : 1,777.86 = 846.34 : x
2. Step 2: Convert to fraction form
   1,287.67/1,777.86 = 846.34/x
3. Step 3: Cross multiply
   1,287.67x = 1,777.86 × 846.34
4. Step 4: Simplify right side
   1,287.67x = 1,504,674.03
5. Step 5: Solve for x
   x = 1,504,674.03/1,287.67
6. Step 6: Final answer
   x = 1,168.52