Finding the Fourth Proportional to 2,238.32, 3,088.88 and 1,243.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.32 : 3,088.88 = 1,243.60 : x
2. Step 2: Convert to fraction form
   2,238.32/3,088.88 = 1,243.60/x
3. Step 3: Cross multiply
   2,238.32x = 3,088.88 × 1,243.60
4. Step 4: Simplify right side
   2,238.32x = 3,841,331.17
5. Step 5: Solve for x
   x = 3,841,331.17/2,238.32
6. Step 6: Final answer
   x = 1,716.17