Finding the Third Proportional to 139,459.50 and 305,541

Step by Step Solution

1. Step 1: Write the proportion equation
   139,459.50 : 305,541 = 305,541 : x
2. Step 2: Convert to fraction form
   139,459.50/305,541 = 305,541/x
3. Step 3: Cross multiply
   139,459.50x = 305,541 × 305,541
4. Step 4: Simplify right side
   139,459.50x = 93,355,302,681
5. Step 5: Solve for x
   x = 93,355,302,681/139,459.50
6. Step 6: Final answer
   x = 669,407.98