Finding the Fourth Proportional to 1,673.78, 2,309.64 and 1,010.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,673.78 : 2,309.64 = 1,010.54 : x
2. Step 2: Convert to fraction form
   1,673.78/2,309.64 = 1,010.54/x
3. Step 3: Cross multiply
   1,673.78x = 2,309.64 × 1,010.54
4. Step 4: Simplify right side
   1,673.78x = 2,333,983.61
5. Step 5: Solve for x
   x = 2,333,983.61/1,673.78
6. Step 6: Final answer
   x = 1,394.44