Finding the Fourth Proportional to 1,208.34, 1,814.56 and 661.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.34 : 1,814.56 = 661.59 : x
2. Step 2: Convert to fraction form
   1,208.34/1,814.56 = 661.59/x
3. Step 3: Cross multiply
   1,208.34x = 1,814.56 × 661.59
4. Step 4: Simplify right side
   1,208.34x = 1,200,493.10
5. Step 5: Solve for x
   x = 1,200,493.10/1,208.34
6. Step 6: Final answer
   x = 993.51