Finding the Fourth Proportional to 1,345.22, 1,856.43 and 814.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.22 : 1,856.43 = 814.10 : x
2. Step 2: Convert to fraction form
   1,345.22/1,856.43 = 814.10/x
3. Step 3: Cross multiply
   1,345.22x = 1,856.43 × 814.10
4. Step 4: Simplify right side
   1,345.22x = 1,511,318.53
5. Step 5: Solve for x
   x = 1,511,318.53/1,345.22
6. Step 6: Final answer
   x = 1,123.47