Finding the Fourth Proportional to 89,028.72, 133,450.79 and 55,672.25

Step by Step Solution

1. Step 1: Write the proportion equation
   89,028.72 : 133,450.79 = 55,672.25 : x
2. Step 2: Convert to fraction form
   89,028.72/133,450.79 = 55,672.25/x
3. Step 3: Cross multiply
   89,028.72x = 133,450.79 × 55,672.25
4. Step 4: Simplify right side
   89,028.72x = 7,429,504,797.96
5. Step 5: Solve for x
   x = 7,429,504,797.96/89,028.72
6. Step 6: Final answer
   x = 83,450.65