Finding the Fourth Proportional to 199,544.10, 275,298.71 and 153,617.78

Step by Step Solution

1. Step 1: Write the proportion equation
   199,544.10 : 275,298.71 = 153,617.78 : x
2. Step 2: Convert to fraction form
   199,544.10/275,298.71 = 153,617.78/x
3. Step 3: Cross multiply
   199,544.10x = 275,298.71 × 153,617.78
4. Step 4: Simplify right side
   199,544.10x = 42,290,776,667.06
5. Step 5: Solve for x
   x = 42,290,776,667.06/199,544.10
6. Step 6: Final answer
   x = 211,936.99