Finding the Fourth Proportional to 89,786.96, 123,768.84 and 57,915.08

Step by Step Solution

1. Step 1: Write the proportion equation
   89,786.96 : 123,768.84 = 57,915.08 : x
2. Step 2: Convert to fraction form
   89,786.96/123,768.84 = 57,915.08/x
3. Step 3: Cross multiply
   89,786.96x = 123,768.84 × 57,915.08
4. Step 4: Simplify right side
   89,786.96x = 7,168,082,270.11
5. Step 5: Solve for x
   x = 7,168,082,270.11/89,786.96
6. Step 6: Final answer
   x = 79,834.34