Finding the Fourth Proportional to 2,168.78, 3,248.91 and 2,057.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.78 : 3,248.91 = 2,057.00 : x
2. Step 2: Convert to fraction form
   2,168.78/3,248.91 = 2,057.00/x
3. Step 3: Cross multiply
   2,168.78x = 3,248.91 × 2,057.00
4. Step 4: Simplify right side
   2,168.78x = 6,682,991.63
5. Step 5: Solve for x
   x = 6,682,991.63/2,168.78
6. Step 6: Final answer
   x = 3,081.46