Finding the Fourth Proportional to 3,109.30, 4,664.02 and 918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.30 : 4,664.02 = 918.10 : x
2. Step 2: Convert to fraction form
   3,109.30/4,664.02 = 918.10/x
3. Step 3: Cross multiply
   3,109.30x = 4,664.02 × 918.10
4. Step 4: Simplify right side
   3,109.30x = 4,282,036.76
5. Step 5: Solve for x
   x = 4,282,036.76/3,109.30
6. Step 6: Final answer
   x = 1,377.17