Finding the Fourth Proportional to 2,597.17, 3,889.89 and 1,820.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,597.17 : 3,889.89 = 1,820.63 : x
2. Step 2: Convert to fraction form
   2,597.17/3,889.89 = 1,820.63/x
3. Step 3: Cross multiply
   2,597.17x = 3,889.89 × 1,820.63
4. Step 4: Simplify right side
   2,597.17x = 7,082,021.88
5. Step 5: Solve for x
   x = 7,082,021.88/2,597.17
6. Step 6: Final answer
   x = 2,726.83