Finding the Fourth Proportional to 1,168.20, 1,612.89 and 814.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.20 : 1,612.89 = 814.02 : x
2. Step 2: Convert to fraction form
   1,168.20/1,612.89 = 814.02/x
3. Step 3: Cross multiply
   1,168.20x = 1,612.89 × 814.02
4. Step 4: Simplify right side
   1,168.20x = 1,312,924.72
5. Step 5: Solve for x
   x = 1,312,924.72/1,168.20
6. Step 6: Final answer
   x = 1,123.89