Finding the Fourth Proportional to 2,237.16, 3,087.36 and 1,242.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,237.16 : 3,087.36 = 1,242.72 : x
2. Step 2: Convert to fraction form
   2,237.16/3,087.36 = 1,242.72/x
3. Step 3: Cross multiply
   2,237.16x = 3,087.36 × 1,242.72
4. Step 4: Simplify right side
   2,237.16x = 3,836,724.02
5. Step 5: Solve for x
   x = 3,836,724.02/2,237.16
6. Step 6: Final answer
   x = 1,715.00