Finding the Fourth Proportional to 2,777.49, 4,164.17 and 1,681.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.49 : 4,164.17 = 1,681.61 : x
2. Step 2: Convert to fraction form
   2,777.49/4,164.17 = 1,681.61/x
3. Step 3: Cross multiply
   2,777.49x = 4,164.17 × 1,681.61
4. Step 4: Simplify right side
   2,777.49x = 7,002,493.30
5. Step 5: Solve for x
   x = 7,002,493.30/2,777.49
6. Step 6: Final answer
   x = 2,521.16