Finding the Fourth Proportional to 1,168.91, 1,613.60 and 814.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.91 : 1,613.60 = 814.89 : x
2. Step 2: Convert to fraction form
   1,168.91/1,613.60 = 814.89/x
3. Step 3: Cross multiply
   1,168.91x = 1,613.60 × 814.89
4. Step 4: Simplify right side
   1,168.91x = 1,314,895.63
5. Step 5: Solve for x
   x = 1,314,895.63/1,168.91
6. Step 6: Final answer
   x = 1,124.89