Finding the Fourth Proportional to 89,458.58, 123,464.50 and 57,719.81

Step by Step Solution

1. Step 1: Write the proportion equation
   89,458.58 : 123,464.50 = 57,719.81 : x
2. Step 2: Convert to fraction form
   89,458.58/123,464.50 = 57,719.81/x
3. Step 3: Cross multiply
   89,458.58x = 123,464.50 × 57,719.81
4. Step 4: Simplify right side
   89,458.58x = 7,126,347,481.75
5. Step 5: Solve for x
   x = 7,126,347,481.75/89,458.58
6. Step 6: Final answer
   x = 79,660.86