Finding the Fourth Proportional to 1,938.10, 2,675.34 and 1,309

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.10 : 2,675.34 = 1,309 : x
2. Step 2: Convert to fraction form
   1,938.10/2,675.34 = 1,309/x
3. Step 3: Cross multiply
   1,938.10x = 2,675.34 × 1,309
4. Step 4: Simplify right side
   1,938.10x = 3,502,020.06
5. Step 5: Solve for x
   x = 3,502,020.06/1,938.10
6. Step 6: Final answer
   x = 1,806.93