Finding the Fourth Proportional to 1,917.06, 2,645.46 and 1,172.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.06 : 2,645.46 = 1,172.27 : x
2. Step 2: Convert to fraction form
   1,917.06/2,645.46 = 1,172.27/x
3. Step 3: Cross multiply
   1,917.06x = 2,645.46 × 1,172.27
4. Step 4: Simplify right side
   1,917.06x = 3,101,180.17
5. Step 5: Solve for x
   x = 3,101,180.17/1,917.06
6. Step 6: Final answer
   x = 1,617.68