Finding the Third Proportional to 1,128.94 and 1,498.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.94 : 1,498.31 = 1,498.31 : x
2. Step 2: Convert to fraction form
   1,128.94/1,498.31 = 1,498.31/x
3. Step 3: Cross multiply
   1,128.94x = 1,498.31 × 1,498.31
4. Step 4: Simplify right side
   1,128.94x = 2,244,940.35
5. Step 5: Solve for x
   x = 2,244,940.35/1,128.94
6. Step 6: Final answer
   x = 1,988.54