Finding the Fourth Proportional to 82,408.82, 123,485.34 and 57,157.63

Step by Step Solution

1. Step 1: Write the proportion equation
   82,408.82 : 123,485.34 = 57,157.63 : x
2. Step 2: Convert to fraction form
   82,408.82/123,485.34 = 57,157.63/x
3. Step 3: Cross multiply
   82,408.82x = 123,485.34 × 57,157.63
4. Step 4: Simplify right side
   82,408.82x = 7,058,129,065.43
5. Step 5: Solve for x
   x = 7,058,129,065.43/82,408.82
6. Step 6: Final answer
   x = 85,647.74