Finding the Fourth Proportional to 1,636.72, 2,256.29 and 1,243.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.72 : 2,256.29 = 1,243.06 : x
2. Step 2: Convert to fraction form
   1,636.72/2,256.29 = 1,243.06/x
3. Step 3: Cross multiply
   1,636.72x = 2,256.29 × 1,243.06
4. Step 4: Simplify right side
   1,636.72x = 2,804,696.65
5. Step 5: Solve for x
   x = 2,804,696.65/1,636.72
6. Step 6: Final answer
   x = 1,713.61