Finding the Fourth Proportional to 1,434.75, 1,980.20 and 814.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.75 : 1,980.20 = 814.11 : x
2. Step 2: Convert to fraction form
   1,434.75/1,980.20 = 814.11/x
3. Step 3: Cross multiply
   1,434.75x = 1,980.20 × 814.11
4. Step 4: Simplify right side
   1,434.75x = 1,612,096.55
5. Step 5: Solve for x
   x = 1,612,096.55/1,434.75
6. Step 6: Final answer
   x = 1,123.61