Finding the Fourth Proportional to 236,837.78, 326,826.42 and 129,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   236,837.78 : 326,826.42 = 129,411.50 : x
2. Step 2: Convert to fraction form
   236,837.78/326,826.42 = 129,411.50/x
3. Step 3: Cross multiply
   236,837.78x = 326,826.42 × 129,411.50
4. Step 4: Simplify right side
   236,837.78x = 42,295,097,251.83
5. Step 5: Solve for x
   x = 42,295,097,251.83/236,837.78
6. Step 6: Final answer
   x = 178,582.56