Finding the Fourth Proportional to 85,613.12, 128,441.59 and 50,104.34

Step by Step Solution

1. Step 1: Write the proportion equation
   85,613.12 : 128,441.59 = 50,104.34 : x
2. Step 2: Convert to fraction form
   85,613.12/128,441.59 = 50,104.34/x
3. Step 3: Cross multiply
   85,613.12x = 128,441.59 × 50,104.34
4. Step 4: Simplify right side
   85,613.12x = 6,435,481,095.50
5. Step 5: Solve for x
   x = 6,435,481,095.50/85,613.12
6. Step 6: Final answer
   x = 75,169.33