Finding the Fourth Proportional to 236,494.69, 326,369.59 and 129,071.61

Step by Step Solution

1. Step 1: Write the proportion equation
   236,494.69 : 326,369.59 = 129,071.61 : x
2. Step 2: Convert to fraction form
   236,494.69/326,369.59 = 129,071.61/x
3. Step 3: Cross multiply
   236,494.69x = 326,369.59 × 129,071.61
4. Step 4: Simplify right side
   236,494.69x = 42,125,048,113.66
5. Step 5: Solve for x
   x = 42,125,048,113.66/236,494.69
6. Step 6: Final answer
   x = 178,122.60