Finding the Third Proportional to 138,434.50 and 213,494

Step by Step Solution

1. Step 1: Write the proportion equation
   138,434.50 : 213,494 = 213,494 : x
2. Step 2: Convert to fraction form
   138,434.50/213,494 = 213,494/x
3. Step 3: Cross multiply
   138,434.50x = 213,494 × 213,494
4. Step 4: Simplify right side
   138,434.50x = 45,579,688,036
5. Step 5: Solve for x
   x = 45,579,688,036/138,434.50
6. Step 6: Final answer
   x = 329,250.93