Finding the Fourth Proportional to 1,615.00, 2,228.63 and 985.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.00 : 2,228.63 = 985.43 : x
2. Step 2: Convert to fraction form
   1,615.00/2,228.63 = 985.43/x
3. Step 3: Cross multiply
   1,615.00x = 2,228.63 × 985.43
4. Step 4: Simplify right side
   1,615.00x = 2,196,151.15
5. Step 5: Solve for x
   x = 2,196,151.15/1,615.00
6. Step 6: Final answer
   x = 1,359.84