Finding the Fourth Proportional to 204,796.72, 307,063.86 and 99,558.28

Step by Step Solution

1. Step 1: Write the proportion equation
   204,796.72 : 307,063.86 = 99,558.28 : x
2. Step 2: Convert to fraction form
   204,796.72/307,063.86 = 99,558.28/x
3. Step 3: Cross multiply
   204,796.72x = 307,063.86 × 99,558.28
4. Step 4: Simplify right side
   204,796.72x = 30,570,749,751.76
5. Step 5: Solve for x
   x = 30,570,749,751.76/204,796.72
6. Step 6: Final answer
   x = 149,273.63