Finding the Third Proportional to 134,905.50 and 289,494

Step by Step Solution

1. Step 1: Write the proportion equation
   134,905.50 : 289,494 = 289,494 : x
2. Step 2: Convert to fraction form
   134,905.50/289,494 = 289,494/x
3. Step 3: Cross multiply
   134,905.50x = 289,494 × 289,494
4. Step 4: Simplify right side
   134,905.50x = 83,806,776,036
5. Step 5: Solve for x
   x = 83,806,776,036/134,905.50
6. Step 6: Final answer
   x = 621,225.79