Finding the Fourth Proportional to 406,496.28, 609,615.25 and 379,961.15

Step by Step Solution

1. Step 1: Write the proportion equation
   406,496.28 : 609,615.25 = 379,961.15 : x
2. Step 2: Convert to fraction form
   406,496.28/609,615.25 = 379,961.15/x
3. Step 3: Cross multiply
   406,496.28x = 609,615.25 × 379,961.15
4. Step 4: Simplify right side
   406,496.28x = 231,630,111,447.54
5. Step 5: Solve for x
   x = 231,630,111,447.54/406,496.28
6. Step 6: Final answer
   x = 569,820.99