Finding the Fourth Proportional to 236,828.48, 355,382.78 and 87,173.89

Step by Step Solution

1. Step 1: Write the proportion equation
   236,828.48 : 355,382.78 = 87,173.89 : x
2. Step 2: Convert to fraction form
   236,828.48/355,382.78 = 87,173.89/x
3. Step 3: Cross multiply
   236,828.48x = 355,382.78 × 87,173.89
4. Step 4: Simplify right side
   236,828.48x = 30,980,098,047.29
5. Step 5: Solve for x
   x = 30,980,098,047.29/236,828.48
6. Step 6: Final answer
   x = 130,812.39