Finding the Fourth Proportional to 2,670.78, 3,685.56 and 1,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,670.78 : 3,685.56 = 1,491.78 : x
2. Step 2: Convert to fraction form
   2,670.78/3,685.56 = 1,491.78/x
3. Step 3: Cross multiply
   2,670.78x = 3,685.56 × 1,491.78
4. Step 4: Simplify right side
   2,670.78x = 5,498,044.70
5. Step 5: Solve for x
   x = 5,498,044.70/2,670.78
6. Step 6: Final answer
   x = 2,058.59