Finding the Fourth Proportional to 2,057.51, 2,839.89 and 1,218.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.51 : 2,839.89 = 1,218.48 : x
2. Step 2: Convert to fraction form
   2,057.51/2,839.89 = 1,218.48/x
3. Step 3: Cross multiply
   2,057.51x = 2,839.89 × 1,218.48
4. Step 4: Simplify right side
   2,057.51x = 3,460,349.17
5. Step 5: Solve for x
   x = 3,460,349.17/2,057.51
6. Step 6: Final answer
   x = 1,681.82