Finding the Fourth Proportional to 2,238.13, 3,088.71 and 1,243.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.13 : 3,088.71 = 1,243.40 : x
2. Step 2: Convert to fraction form
   2,238.13/3,088.71 = 1,243.40/x
3. Step 3: Cross multiply
   2,238.13x = 3,088.71 × 1,243.40
4. Step 4: Simplify right side
   2,238.13x = 3,840,500.45
5. Step 5: Solve for x
   x = 3,840,500.45/2,238.13
6. Step 6: Final answer
   x = 1,715.94