Finding the Fourth Proportional to 1,456.70, 2,181.94 and 906.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.70 : 2,181.94 = 906.18 : x
2. Step 2: Convert to fraction form
   1,456.70/2,181.94 = 906.18/x
3. Step 3: Cross multiply
   1,456.70x = 2,181.94 × 906.18
4. Step 4: Simplify right side
   1,456.70x = 1,977,230.39
5. Step 5: Solve for x
   x = 1,977,230.39/1,456.70
6. Step 6: Final answer
   x = 1,357.34