Finding the Fourth Proportional to 406,947, 561,586.86 and 228,099

Step by Step Solution

1. Step 1: Write the proportion equation
   406,947 : 561,586.86 = 228,099 : x
2. Step 2: Convert to fraction form
   406,947/561,586.86 = 228,099/x
3. Step 3: Cross multiply
   406,947x = 561,586.86 × 228,099
4. Step 4: Simplify right side
   406,947x = 128,097,401,179.14
5. Step 5: Solve for x
   x = 128,097,401,179.14/406,947
6. Step 6: Final answer
   x = 314,776.62