Finding the Fourth Proportional to 1,615.02, 2,227.86 and 985.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.02 : 2,227.86 = 985.40 : x
2. Step 2: Convert to fraction form
   1,615.02/2,227.86 = 985.40/x
3. Step 3: Cross multiply
   1,615.02x = 2,227.86 × 985.40
4. Step 4: Simplify right side
   1,615.02x = 2,195,322.10
5. Step 5: Solve for x
   x = 2,195,322.10/1,615.02
6. Step 6: Final answer
   x = 1,359.32