Finding the Fourth Proportional to 3,109.89, 4,664.18 and 918.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.89 : 4,664.18 = 918.03 : x
2. Step 2: Convert to fraction form
   3,109.89/4,664.18 = 918.03/x
3. Step 3: Cross multiply
   3,109.89x = 4,664.18 × 918.03
4. Step 4: Simplify right side
   3,109.89x = 4,281,876.95
5. Step 5: Solve for x
   x = 4,281,876.95/3,109.89
6. Step 6: Final answer
   x = 1,376.86