Finding the Third Proportional to 133,870 and 288,476

Step by Step Solution

1. Step 1: Write the proportion equation
   133,870 : 288,476 = 288,476 : x
2. Step 2: Convert to fraction form
   133,870/288,476 = 288,476/x
3. Step 3: Cross multiply
   133,870x = 288,476 × 288,476
4. Step 4: Simplify right side
   133,870x = 83,218,402,576
5. Step 5: Solve for x
   x = 83,218,402,576/133,870
6. Step 6: Final answer
   x = 621,635.93