Finding the Fourth Proportional to 123,621, 185,462.58 and 57,108.18

Step by Step Solution

1. Step 1: Write the proportion equation
   123,621 : 185,462.58 = 57,108.18 : x
2. Step 2: Convert to fraction form
   123,621/185,462.58 = 57,108.18/x
3. Step 3: Cross multiply
   123,621x = 185,462.58 × 57,108.18
4. Step 4: Simplify right side
   123,621x = 10,591,430,401.90
5. Step 5: Solve for x
   x = 10,591,430,401.90/123,621
6. Step 6: Final answer
   x = 85,676.63