Finding the Fourth Proportional to 228,965.69, 341,780.79 and 212,081.29

Step by Step Solution

1. Step 1: Write the proportion equation
   228,965.69 : 341,780.79 = 212,081.29 : x
2. Step 2: Convert to fraction form
   228,965.69/341,780.79 = 212,081.29/x
3. Step 3: Cross multiply
   228,965.69x = 341,780.79 × 212,081.29
4. Step 4: Simplify right side
   228,965.69x = 72,485,309,131.52
5. Step 5: Solve for x
   x = 72,485,309,131.52/228,965.69
6. Step 6: Final answer
   x = 316,577.17