Finding the Fourth Proportional to 1,636.52, 2,439.37 and 1,505.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.52 : 2,439.37 = 1,505.30 : x
2. Step 2: Convert to fraction form
   1,636.52/2,439.37 = 1,505.30/x
3. Step 3: Cross multiply
   1,636.52x = 2,439.37 × 1,505.30
4. Step 4: Simplify right side
   1,636.52x = 3,671,976.13
5. Step 5: Solve for x
   x = 3,671,976.13/1,636.52
6. Step 6: Final answer
   x = 2,243.77