Finding the Fourth Proportional to 2,674.79, 3,690.59 and 1,555.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,674.79 : 3,690.59 = 1,555.06 : x
2. Step 2: Convert to fraction form
   2,674.79/3,690.59 = 1,555.06/x
3. Step 3: Cross multiply
   2,674.79x = 3,690.59 × 1,555.06
4. Step 4: Simplify right side
   2,674.79x = 5,739,070.43
5. Step 5: Solve for x
   x = 5,739,070.43/2,674.79
6. Step 6: Final answer
   x = 2,145.62