Finding the Fourth Proportional to 89,649, 123,674.09 and 57,828.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89,649 : 123,674.09 = 57,828.15 : x
2. Step 2: Convert to fraction form
   89,649/123,674.09 = 57,828.15/x
3. Step 3: Cross multiply
   89,649x = 123,674.09 × 57,828.15
4. Step 4: Simplify right side
   89,649x = 7,151,843,538.49
5. Step 5: Solve for x
   x = 7,151,843,538.49/89,649
6. Step 6: Final answer
   x = 79,776.05