Finding the Fourth Proportional to 2,239.99, 3,089.61 and 1,820.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,239.99 : 3,089.61 = 1,820.34 : x
2. Step 2: Convert to fraction form
   2,239.99/3,089.61 = 1,820.34/x
3. Step 3: Cross multiply
   2,239.99x = 3,089.61 × 1,820.34
4. Step 4: Simplify right side
   2,239.99x = 5,624,140.67
5. Step 5: Solve for x
   x = 5,624,140.67/2,239.99
6. Step 6: Final answer
   x = 2,510.79