Finding the Fourth Proportional to 1,345.43, 1,856.63 and 814.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.43 : 1,856.63 = 814.46 : x
2. Step 2: Convert to fraction form
   1,345.43/1,856.63 = 814.46/x
3. Step 3: Cross multiply
   1,345.43x = 1,856.63 × 814.46
4. Step 4: Simplify right side
   1,345.43x = 1,512,143.62
5. Step 5: Solve for x
   x = 1,512,143.62/1,345.43
6. Step 6: Final answer
   x = 1,123.91