Finding the Fourth Proportional to 316,072.82, 436,196.70 and 172,831.34

Step by Step Solution

1. Step 1: Write the proportion equation
   316,072.82 : 436,196.70 = 172,831.34 : x
2. Step 2: Convert to fraction form
   316,072.82/436,196.70 = 172,831.34/x
3. Step 3: Cross multiply
   316,072.82x = 436,196.70 × 172,831.34
4. Step 4: Simplify right side
   316,072.82x = 75,388,460,164.58
5. Step 5: Solve for x
   x = 75,388,460,164.58/316,072.82
6. Step 6: Final answer
   x = 238,516.11