Finding the Fourth Proportional to 198,855.69, 274,420.89 and 109,431.69

Step by Step Solution

1. Step 1: Write the proportion equation
   198,855.69 : 274,420.89 = 109,431.69 : x
2. Step 2: Convert to fraction form
   198,855.69/274,420.89 = 109,431.69/x
3. Step 3: Cross multiply
   198,855.69x = 274,420.89 × 109,431.69
4. Step 4: Simplify right side
   198,855.69x = 30,030,341,764.00
5. Step 5: Solve for x
   x = 30,030,341,764.00/198,855.69
6. Step 6: Final answer
   x = 151,015.75