Finding the Fourth Proportional to 300,136.05, 414,223.47 and 172,836.45

Step by Step Solution

1. Step 1: Write the proportion equation
   300,136.05 : 414,223.47 = 172,836.45 : x
2. Step 2: Convert to fraction form
   300,136.05/414,223.47 = 172,836.45/x
3. Step 3: Cross multiply
   300,136.05x = 414,223.47 × 172,836.45
4. Step 4: Simplify right side
   300,136.05x = 71,592,914,061.48
5. Step 5: Solve for x
   x = 71,592,914,061.48/300,136.05
6. Step 6: Final answer
   x = 238,534.87