Finding the Fourth Proportional to 1,736.10, 2,605.18 and 1,172.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,736.10 : 2,605.18 = 1,172.09 : x
2. Step 2: Convert to fraction form
   1,736.10/2,605.18 = 1,172.09/x
3. Step 3: Cross multiply
   1,736.10x = 2,605.18 × 1,172.09
4. Step 4: Simplify right side
   1,736.10x = 3,053,509.01
5. Step 5: Solve for x
   x = 3,053,509.01/1,736.10
6. Step 6: Final answer
   x = 1,758.83