Finding the Fourth Proportional to 2,287.63, 3,429.42 and 988.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.63 : 3,429.42 = 988.39 : x
2. Step 2: Convert to fraction form
   2,287.63/3,429.42 = 988.39/x
3. Step 3: Cross multiply
   2,287.63x = 3,429.42 × 988.39
4. Step 4: Simplify right side
   2,287.63x = 3,389,604.43
5. Step 5: Solve for x
   x = 3,389,604.43/2,287.63
6. Step 6: Final answer
   x = 1,481.71