Finding the Fourth Proportional to 2,126.72, 3,190.73 and 1,087.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.72 : 3,190.73 = 1,087.45 : x
2. Step 2: Convert to fraction form
   2,126.72/3,190.73 = 1,087.45/x
3. Step 3: Cross multiply
   2,126.72x = 3,190.73 × 1,087.45
4. Step 4: Simplify right side
   2,126.72x = 3,469,754.90
5. Step 5: Solve for x
   x = 3,469,754.90/2,126.72
6. Step 6: Final answer
   x = 1,631.51