Finding the Fourth Proportional to 2,237.34, 3,087.72 and 1,242.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,237.34 : 3,087.72 = 1,242.78 : x
2. Step 2: Convert to fraction form
   2,237.34/3,087.72 = 1,242.78/x
3. Step 3: Cross multiply
   2,237.34x = 3,087.72 × 1,242.78
4. Step 4: Simplify right side
   2,237.34x = 3,837,356.66
5. Step 5: Solve for x
   x = 3,837,356.66/2,237.34
6. Step 6: Final answer
   x = 1,715.14