Finding the Fourth Proportional to 323,593.41, 485,357.31 and 86,905.34

Step by Step Solution

1. Step 1: Write the proportion equation
   323,593.41 : 485,357.31 = 86,905.34 : x
2. Step 2: Convert to fraction form
   323,593.41/485,357.31 = 86,905.34/x
3. Step 3: Cross multiply
   323,593.41x = 485,357.31 × 86,905.34
4. Step 4: Simplify right side
   323,593.41x = 42,180,142,047.04
5. Step 5: Solve for x
   x = 42,180,142,047.04/323,593.41
6. Step 6: Final answer
   x = 130,349.20