Finding the Fourth Proportional to 128,031.86, 191,939.34 and 53,105.24

Step by Step Solution

1. Step 1: Write the proportion equation
   128,031.86 : 191,939.34 = 53,105.24 : x
2. Step 2: Convert to fraction form
   128,031.86/191,939.34 = 53,105.24/x
3. Step 3: Cross multiply
   128,031.86x = 191,939.34 × 53,105.24
4. Step 4: Simplify right side
   128,031.86x = 10,192,985,395.13
5. Step 5: Solve for x
   x = 10,192,985,395.13/128,031.86
6. Step 6: Final answer
   x = 79,612.88