Finding the Fourth Proportional to 2,238.51, 3,089.17 and 1,243.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.51 : 3,089.17 = 1,243.90 : x
2. Step 2: Convert to fraction form
   2,238.51/3,089.17 = 1,243.90/x
3. Step 3: Cross multiply
   2,238.51x = 3,089.17 × 1,243.90
4. Step 4: Simplify right side
   2,238.51x = 3,842,623.98
5. Step 5: Solve for x
   x = 3,842,623.98/2,238.51
6. Step 6: Final answer
   x = 1,716.60