Finding the Fourth Proportional to 1,456.38, 2,179.98 and 906.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.38 : 2,179.98 = 906.12 : x
2. Step 2: Convert to fraction form
   1,456.38/2,179.98 = 906.12/x
3. Step 3: Cross multiply
   1,456.38x = 2,179.98 × 906.12
4. Step 4: Simplify right side
   1,456.38x = 1,975,323.48
5. Step 5: Solve for x
   x = 1,975,323.48/1,456.38
6. Step 6: Final answer
   x = 1,356.32