Finding the Fourth Proportional to 3,109.84, 4,664.72 and 918.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.84 : 4,664.72 = 918.56 : x
2. Step 2: Convert to fraction form
   3,109.84/4,664.72 = 918.56/x
3. Step 3: Cross multiply
   3,109.84x = 4,664.72 × 918.56
4. Step 4: Simplify right side
   3,109.84x = 4,284,825.20
5. Step 5: Solve for x
   x = 4,284,825.20/3,109.84
6. Step 6: Final answer
   x = 1,377.83