Finding the Fourth Proportional to 1,508.14, 2,081.88 and 918.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.14 : 2,081.88 = 918.88 : x
2. Step 2: Convert to fraction form
   1,508.14/2,081.88 = 918.88/x
3. Step 3: Cross multiply
   1,508.14x = 2,081.88 × 918.88
4. Step 4: Simplify right side
   1,508.14x = 1,912,997.89
5. Step 5: Solve for x
   x = 1,912,997.89/1,508.14
6. Step 6: Final answer
   x = 1,268.45