Finding the Fourth Proportional to 205,005.72, 307,485.72 and 55,260.94

Step by Step Solution

1. Step 1: Write the proportion equation
   205,005.72 : 307,485.72 = 55,260.94 : x
2. Step 2: Convert to fraction form
   205,005.72/307,485.72 = 55,260.94/x
3. Step 3: Cross multiply
   205,005.72x = 307,485.72 × 55,260.94
4. Step 4: Simplify right side
   205,005.72x = 16,991,949,923.78
5. Step 5: Solve for x
   x = 16,991,949,923.78/205,005.72
6. Step 6: Final answer
   x = 82,885.25