Finding the Fourth Proportional to 1,917.38, 2,647.78 and 1,246.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.38 : 2,647.78 = 1,246.34 : x
2. Step 2: Convert to fraction form
   1,917.38/2,647.78 = 1,246.34/x
3. Step 3: Cross multiply
   1,917.38x = 2,647.78 × 1,246.34
4. Step 4: Simplify right side
   1,917.38x = 3,300,034.13
5. Step 5: Solve for x
   x = 3,300,034.13/1,917.38
6. Step 6: Final answer
   x = 1,721.12