Finding the Fourth Proportional to 1,673.69, 2,309.72 and 1,010.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,673.69 : 2,309.72 = 1,010.57 : x
2. Step 2: Convert to fraction form
   1,673.69/2,309.72 = 1,010.57/x
3. Step 3: Cross multiply
   1,673.69x = 2,309.72 × 1,010.57
4. Step 4: Simplify right side
   1,673.69x = 2,334,117.14
5. Step 5: Solve for x
   x = 2,334,117.14/1,673.69
6. Step 6: Final answer
   x = 1,394.60