Finding the Fourth Proportional to 1,485.76, 2,227.69 and 705.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.76 : 2,227.69 = 705.28 : x
2. Step 2: Convert to fraction form
   1,485.76/2,227.69 = 705.28/x
3. Step 3: Cross multiply
   1,485.76x = 2,227.69 × 705.28
4. Step 4: Simplify right side
   1,485.76x = 1,571,145.20
5. Step 5: Solve for x
   x = 1,571,145.20/1,485.76
6. Step 6: Final answer
   x = 1,057.47