Finding the Fourth Proportional to 3,689.90, 5,093.79 and 2,642.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.90 : 5,093.79 = 2,642.54 : x
2. Step 2: Convert to fraction form
   3,689.90/5,093.79 = 2,642.54/x
3. Step 3: Cross multiply
   3,689.90x = 5,093.79 × 2,642.54
4. Step 4: Simplify right side
   3,689.90x = 13,460,543.83
5. Step 5: Solve for x
   x = 13,460,543.83/3,689.90
6. Step 6: Final answer
   x = 3,647.94