Finding the Fourth Proportional to 323,871.30, 485,720.55 and 113,487.30

Step by Step Solution

1. Step 1: Write the proportion equation
   323,871.30 : 485,720.55 = 113,487.30 : x
2. Step 2: Convert to fraction form
   323,871.30/485,720.55 = 113,487.30/x
3. Step 3: Cross multiply
   323,871.30x = 485,720.55 × 113,487.30
4. Step 4: Simplify right side
   323,871.30x = 55,123,113,774.02
5. Step 5: Solve for x
   x = 55,123,113,774.02/323,871.30
6. Step 6: Final answer
   x = 170,200.67