Finding the Fourth Proportional to 83,959.68, 115,859.52 and 50,419.20

Step by Step Solution

1. Step 1: Write the proportion equation
   83,959.68 : 115,859.52 = 50,419.20 : x
2. Step 2: Convert to fraction form
   83,959.68/115,859.52 = 50,419.20/x
3. Step 3: Cross multiply
   83,959.68x = 115,859.52 × 50,419.20
4. Step 4: Simplify right side
   83,959.68x = 5,841,544,310.78
5. Step 5: Solve for x
   x = 5,841,544,310.78/83,959.68
6. Step 6: Final answer
   x = 69,575.59