Finding the Fourth Proportional to 128,081.55, 192,144.60 and 53,160.60

Step by Step Solution

1. Step 1: Write the proportion equation
   128,081.55 : 192,144.60 = 53,160.60 : x
2. Step 2: Convert to fraction form
   128,081.55/192,144.60 = 53,160.60/x
3. Step 3: Cross multiply
   128,081.55x = 192,144.60 × 53,160.60
4. Step 4: Simplify right side
   128,081.55x = 10,214,522,222.76
5. Step 5: Solve for x
   x = 10,214,522,222.76/128,081.55
6. Step 6: Final answer
   x = 79,750.15