Finding the Third Proportional to 345,562.50 and 515,679

Step by Step Solution

1. Step 1: Write the proportion equation
   345,562.50 : 515,679 = 515,679 : x
2. Step 2: Convert to fraction form
   345,562.50/515,679 = 515,679/x
3. Step 3: Cross multiply
   345,562.50x = 515,679 × 515,679
4. Step 4: Simplify right side
   345,562.50x = 265,924,831,041
5. Step 5: Solve for x
   x = 265,924,831,041/345,562.50
6. Step 6: Final answer
   x = 769,541.92