Finding the Fourth Proportional to 89,596.42, 123,654.48 and 57,857.58

Step by Step Solution

1. Step 1: Write the proportion equation
   89,596.42 : 123,654.48 = 57,857.58 : x
2. Step 2: Convert to fraction form
   89,596.42/123,654.48 = 57,857.58/x
3. Step 3: Cross multiply
   89,596.42x = 123,654.48 × 57,857.58
4. Step 4: Simplify right side
   89,596.42x = 7,154,348,968.96
5. Step 5: Solve for x
   x = 7,154,348,968.96/89,596.42
6. Step 6: Final answer
   x = 79,850.84