Finding the Fourth Proportional to 2,661.06, 3,672.69 and 1,917.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.06 : 3,672.69 = 1,917.48 : x
2. Step 2: Convert to fraction form
   2,661.06/3,672.69 = 1,917.48/x
3. Step 3: Cross multiply
   2,661.06x = 3,672.69 × 1,917.48
4. Step 4: Simplify right side
   2,661.06x = 7,042,309.62
5. Step 5: Solve for x
   x = 7,042,309.62/2,661.06
6. Step 6: Final answer
   x = 2,646.43