Finding the Fourth Proportional to 128,200.49, 192,369.59 and 53,372.29

Step by Step Solution

1. Step 1: Write the proportion equation
   128,200.49 : 192,369.59 = 53,372.29 : x
2. Step 2: Convert to fraction form
   128,200.49/192,369.59 = 53,372.29/x
3. Step 3: Cross multiply
   128,200.49x = 192,369.59 × 53,372.29
4. Step 4: Simplify right side
   128,200.49x = 10,267,204,997.02
5. Step 5: Solve for x
   x = 10,267,204,997.02/128,200.49
6. Step 6: Final answer
   x = 80,087.09