Finding the Fourth Proportional to 2,631.82, 3,948.94 and 988.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.82 : 3,948.94 = 988.14 : x
2. Step 2: Convert to fraction form
   2,631.82/3,948.94 = 988.14/x
3. Step 3: Cross multiply
   2,631.82x = 3,948.94 × 988.14
4. Step 4: Simplify right side
   2,631.82x = 3,902,105.57
5. Step 5: Solve for x
   x = 3,902,105.57/2,631.82
6. Step 6: Final answer
   x = 1,482.66