Finding the Fourth Proportional to 2,598.17, 3,891.38 and 1,821.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,598.17 : 3,891.38 = 1,821.62 : x
2. Step 2: Convert to fraction form
   2,598.17/3,891.38 = 1,821.62/x
3. Step 3: Cross multiply
   2,598.17x = 3,891.38 × 1,821.62
4. Step 4: Simplify right side
   2,598.17x = 7,088,615.64
5. Step 5: Solve for x
   x = 7,088,615.64/2,598.17
6. Step 6: Final answer
   x = 2,728.31