Finding the Fourth Proportional to 236,590.30, 326,499.56 and 129,164.86

Step by Step Solution

1. Step 1: Write the proportion equation
   236,590.30 : 326,499.56 = 129,164.86 : x
2. Step 2: Convert to fraction form
   236,590.30/326,499.56 = 129,164.86/x
3. Step 3: Cross multiply
   236,590.30x = 326,499.56 × 129,164.86
4. Step 4: Simplify right side
   236,590.30x = 42,172,269,311.64
5. Step 5: Solve for x
   x = 42,172,269,311.64/236,590.30
6. Step 6: Final answer
   x = 178,250.20