Finding the Fourth Proportional to 2,078.42, 3,113.24 and 1,681.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.42 : 3,113.24 = 1,681.40 : x
2. Step 2: Convert to fraction form
   2,078.42/3,113.24 = 1,681.40/x
3. Step 3: Cross multiply
   2,078.42x = 3,113.24 × 1,681.40
4. Step 4: Simplify right side
   2,078.42x = 5,234,577.76
5. Step 5: Solve for x
   x = 5,234,577.76/2,078.42
6. Step 6: Final answer
   x = 2,518.54