Finding the Fourth Proportional to 1,615.59, 2,228.73 and 1,436.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615.59 : 2,228.73 = 1,436.09 : x
2. Step 2: Convert to fraction form
   1,615.59/2,228.73 = 1,436.09/x
3. Step 3: Cross multiply
   1,615.59x = 2,228.73 × 1,436.09
4. Step 4: Simplify right side
   1,615.59x = 3,200,645.72
5. Step 5: Solve for x
   x = 3,200,645.72/1,615.59
6. Step 6: Final answer
   x = 1,981.10