Finding the Fourth Proportional to 2,114.82, 3,173.14 and 1,139.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.82 : 3,173.14 = 1,139.78 : x
2. Step 2: Convert to fraction form
   2,114.82/3,173.14 = 1,139.78/x
3. Step 3: Cross multiply
   2,114.82x = 3,173.14 × 1,139.78
4. Step 4: Simplify right side
   2,114.82x = 3,616,681.51
5. Step 5: Solve for x
   x = 3,616,681.51/2,114.82
6. Step 6: Final answer
   x = 1,710.16