Finding the Fourth Proportional to 245,433.55, 368,059.18 and 85,468.42

Step by Step Solution

1. Step 1: Write the proportion equation
   245,433.55 : 368,059.18 = 85,468.42 : x
2. Step 2: Convert to fraction form
   245,433.55/368,059.18 = 85,468.42/x
3. Step 3: Cross multiply
   245,433.55x = 368,059.18 × 85,468.42
4. Step 4: Simplify right side
   245,433.55x = 31,457,436,581.10
5. Step 5: Solve for x
   x = 31,457,436,581.10/245,433.55
6. Step 6: Final answer
   x = 128,170.89