Finding the Third Proportional to 138,544.50 and 298,959

Step by Step Solution

1. Step 1: Write the proportion equation
   138,544.50 : 298,959 = 298,959 : x
2. Step 2: Convert to fraction form
   138,544.50/298,959 = 298,959/x
3. Step 3: Cross multiply
   138,544.50x = 298,959 × 298,959
4. Step 4: Simplify right side
   138,544.50x = 89,376,483,681
5. Step 5: Solve for x
   x = 89,376,483,681/138,544.50
6. Step 6: Final answer
   x = 645,110.30