Finding the Fourth Proportional to 3,392.06, 5,089.82 and 1,638.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,392.06 : 5,089.82 = 1,638.56 : x
2. Step 2: Convert to fraction form
   3,392.06/5,089.82 = 1,638.56/x
3. Step 3: Cross multiply
   3,392.06x = 5,089.82 × 1,638.56
4. Step 4: Simplify right side
   3,392.06x = 8,339,941.82
5. Step 5: Solve for x
   x = 8,339,941.82/3,392.06
6. Step 6: Final answer
   x = 2,458.67