Finding the Fourth Proportional to 2,748.78, 4,118.31 and 2,690.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.78 : 4,118.31 = 2,690.46 : x
2. Step 2: Convert to fraction form
   2,748.78/4,118.31 = 2,690.46/x
3. Step 3: Cross multiply
   2,748.78x = 4,118.31 × 2,690.46
4. Step 4: Simplify right side
   2,748.78x = 11,080,148.32
5. Step 5: Solve for x
   x = 11,080,148.32/2,748.78
6. Step 6: Final answer
   x = 4,030.93