Finding the Fourth Proportional to 236,786.31, 326,759.76 and 129,356.82

Step by Step Solution

1. Step 1: Write the proportion equation
   236,786.31 : 326,759.76 = 129,356.82 : x
2. Step 2: Convert to fraction form
   236,786.31/326,759.76 = 129,356.82/x
3. Step 3: Cross multiply
   236,786.31x = 326,759.76 × 129,356.82
4. Step 4: Simplify right side
   236,786.31x = 42,268,603,457.56
5. Step 5: Solve for x
   x = 42,268,603,457.56/236,786.31
6. Step 6: Final answer
   x = 178,509.49