Finding the Fourth Proportional to 610,796.39, 842,899.73 and 356,196.78

Step by Step Solution

1. Step 1: Write the proportion equation
   610,796.39 : 842,899.73 = 356,196.78 : x
2. Step 2: Convert to fraction form
   610,796.39/842,899.73 = 356,196.78/x
3. Step 3: Cross multiply
   610,796.39x = 842,899.73 × 356,196.78
4. Step 4: Simplify right side
   610,796.39x = 300,238,167,907.89
5. Step 5: Solve for x
   x = 300,238,167,907.89/610,796.39
6. Step 6: Final answer
   x = 491,551.97