Finding the Third Proportional to 137,439 and 298,374

Step by Step Solution

1. Step 1: Write the proportion equation
   137,439 : 298,374 = 298,374 : x
2. Step 2: Convert to fraction form
   137,439/298,374 = 298,374/x
3. Step 3: Cross multiply
   137,439x = 298,374 × 298,374
4. Step 4: Simplify right side
   137,439x = 89,027,043,876
5. Step 5: Solve for x
   x = 89,027,043,876/137,439
6. Step 6: Final answer
   x = 647,756.78