Finding the Fourth Proportional to 396,300.56, 546,894.78 and 226,538.33

Step by Step Solution

1. Step 1: Write the proportion equation
   396,300.56 : 546,894.78 = 226,538.33 : x
2. Step 2: Convert to fraction form
   396,300.56/546,894.78 = 226,538.33/x
3. Step 3: Cross multiply
   396,300.56x = 546,894.78 × 226,538.33
4. Step 4: Simplify right side
   396,300.56x = 123,892,630,146.92
5. Step 5: Solve for x
   x = 123,892,630,146.92/396,300.56
6. Step 6: Final answer
   x = 312,622.90