Finding the Fourth Proportional to 89,208.72, 123,109.73 and 48,920.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89,208.72 : 123,109.73 = 48,920.09 : x
2. Step 2: Convert to fraction form
   89,208.72/123,109.73 = 48,920.09/x
3. Step 3: Cross multiply
   89,208.72x = 123,109.73 × 48,920.09
4. Step 4: Simplify right side
   89,208.72x = 6,022,538,211.33
5. Step 5: Solve for x
   x = 6,022,538,211.33/89,208.72
6. Step 6: Final answer
   x = 67,510.64