Finding the Fourth Proportional to 1,615.06, 2,228.34 and 985.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.06 : 2,228.34 = 985.69 : x
2. Step 2: Convert to fraction form
   1,615.06/2,228.34 = 985.69/x
3. Step 3: Cross multiply
   1,615.06x = 2,228.34 × 985.69
4. Step 4: Simplify right side
   1,615.06x = 2,196,452.45
5. Step 5: Solve for x
   x = 2,196,452.45/1,615.06
6. Step 6: Final answer
   x = 1,359.98