Finding the Fourth Proportional to 323,622.40, 485,433.18 and 86,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   323,622.40 : 485,433.18 = 86,965.10 : x
2. Step 2: Convert to fraction form
   323,622.40/485,433.18 = 86,965.10/x
3. Step 3: Cross multiply
   323,622.40x = 485,433.18 × 86,965.10
4. Step 4: Simplify right side
   323,622.40x = 42,215,745,042.02
5. Step 5: Solve for x
   x = 42,215,745,042.02/323,622.40
6. Step 6: Final answer
   x = 130,447.54