Finding the Third Proportional to 134,470.81 and 289,688.69

Step by Step Solution

1. Step 1: Write the proportion equation
   134,470.81 : 289,688.69 = 289,688.69 : x
2. Step 2: Convert to fraction form
   134,470.81/289,688.69 = 289,688.69/x
3. Step 3: Cross multiply
   134,470.81x = 289,688.69 × 289,688.69
4. Step 4: Simplify right side
   134,470.81x = 83,919,535,665.47
5. Step 5: Solve for x
   x = 83,919,535,665.47/134,470.81
6. Step 6: Final answer
   x = 624,072.50