Finding the Fourth Proportional to 89,460.45, 123,467.10 and 57,721.68

Step by Step Solution

1. Step 1: Write the proportion equation
   89,460.45 : 123,467.10 = 57,721.68 : x
2. Step 2: Convert to fraction form
   89,460.45/123,467.10 = 57,721.68/x
3. Step 3: Cross multiply
   89,460.45x = 123,467.10 × 57,721.68
4. Step 4: Simplify right side
   89,460.45x = 7,126,728,436.73
5. Step 5: Solve for x
   x = 7,126,728,436.73/89,460.45
6. Step 6: Final answer
   x = 79,663.45