Finding the Fourth Proportional to 2,936.70, 4,406.76 and 1,089.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,936.70 : 4,406.76 = 1,089.12 : x
2. Step 2: Convert to fraction form
   2,936.70/4,406.76 = 1,089.12/x
3. Step 3: Cross multiply
   2,936.70x = 4,406.76 × 1,089.12
4. Step 4: Simplify right side
   2,936.70x = 4,799,490.45
5. Step 5: Solve for x
   x = 4,799,490.45/2,936.70
6. Step 6: Final answer
   x = 1,634.31