Finding the Fourth Proportional to 1,485.56, 2,227.59 and 869.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.56 : 2,227.59 = 869.45 : x
2. Step 2: Convert to fraction form
   1,485.56/2,227.59 = 869.45/x
3. Step 3: Cross multiply
   1,485.56x = 2,227.59 × 869.45
4. Step 4: Simplify right side
   1,485.56x = 1,936,778.13
5. Step 5: Solve for x
   x = 1,936,778.13/1,485.56
6. Step 6: Final answer
   x = 1,303.74