Finding the Fourth Proportional to 128,339.57, 192,542.15 and 53,434.82

Step by Step Solution

1. Step 1: Write the proportion equation
   128,339.57 : 192,542.15 = 53,434.82 : x
2. Step 2: Convert to fraction form
   128,339.57/192,542.15 = 53,434.82/x
3. Step 3: Cross multiply
   128,339.57x = 192,542.15 × 53,434.82
4. Step 4: Simplify right side
   128,339.57x = 10,288,455,742.61
5. Step 5: Solve for x
   x = 10,288,455,742.61/128,339.57
6. Step 6: Final answer
   x = 80,165.89