Finding the Fourth Proportional to 128,069.85, 192,112.96 and 53,196.09

Step by Step Solution

1. Step 1: Write the proportion equation
   128,069.85 : 192,112.96 = 53,196.09 : x
2. Step 2: Convert to fraction form
   128,069.85/192,112.96 = 53,196.09/x
3. Step 3: Cross multiply
   128,069.85x = 192,112.96 × 53,196.09
4. Step 4: Simplify right side
   128,069.85x = 10,219,658,310.33
5. Step 5: Solve for x
   x = 10,219,658,310.33/128,069.85
6. Step 6: Final answer
   x = 79,797.53