Finding the Third Proportional to 135,905 and 307,043.50

Step by Step Solution

1. Step 1: Write the proportion equation
   135,905 : 307,043.50 = 307,043.50 : x
2. Step 2: Convert to fraction form
   135,905/307,043.50 = 307,043.50/x
3. Step 3: Cross multiply
   135,905x = 307,043.50 × 307,043.50
4. Step 4: Simplify right side
   135,905x = 94,275,710,892.25
5. Step 5: Solve for x
   x = 94,275,710,892.25/135,905
6. Step 6: Final answer
   x = 693,688.32