Finding the Fourth Proportional to 199,635, 275,496.72 and 108,991

Step by Step Solution

1. Step 1: Write the proportion equation
   199,635 : 275,496.72 = 108,991 : x
2. Step 2: Convert to fraction form
   199,635/275,496.72 = 108,991/x
3. Step 3: Cross multiply
   199,635x = 275,496.72 × 108,991
4. Step 4: Simplify right side
   199,635x = 30,026,663,009.52
5. Step 5: Solve for x
   x = 30,026,663,009.52/199,635
6. Step 6: Final answer
   x = 150,407.81