Finding the Fourth Proportional to 123,789.84, 185,654.82 and 57,165.90

Step by Step Solution

1. Step 1: Write the proportion equation
   123,789.84 : 185,654.82 = 57,165.90 : x
2. Step 2: Convert to fraction form
   123,789.84/185,654.82 = 57,165.90/x
3. Step 3: Cross multiply
   123,789.84x = 185,654.82 × 57,165.90
4. Step 4: Simplify right side
   123,789.84x = 10,613,124,874.64
5. Step 5: Solve for x
   x = 10,613,124,874.64/123,789.84
6. Step 6: Final answer
   x = 85,735.02