Finding the Third Proportional to 138,154.50 and 305,346

Step by Step Solution

1. Step 1: Write the proportion equation
   138,154.50 : 305,346 = 305,346 : x
2. Step 2: Convert to fraction form
   138,154.50/305,346 = 305,346/x
3. Step 3: Cross multiply
   138,154.50x = 305,346 × 305,346
4. Step 4: Simplify right side
   138,154.50x = 93,236,179,716
5. Step 5: Solve for x
   x = 93,236,179,716/138,154.50
6. Step 6: Final answer
   x = 674,868.93