Finding the Fourth Proportional to 619,100.82, 854,540.55 and 404,274.24

Step by Step Solution

1. Step 1: Write the proportion equation
   619,100.82 : 854,540.55 = 404,274.24 : x
2. Step 2: Convert to fraction form
   619,100.82/854,540.55 = 404,274.24/x
3. Step 3: Cross multiply
   619,100.82x = 854,540.55 × 404,274.24
4. Step 4: Simplify right side
   619,100.82x = 345,468,731,400.43
5. Step 5: Solve for x
   x = 345,468,731,400.43/619,100.82
6. Step 6: Final answer
   x = 558,016.92