Finding the Fourth Proportional to 86,156.79, 118,878.78 and 50,339.88

Step by Step Solution

1. Step 1: Write the proportion equation
   86,156.79 : 118,878.78 = 50,339.88 : x
2. Step 2: Convert to fraction form
   86,156.79/118,878.78 = 50,339.88/x
3. Step 3: Cross multiply
   86,156.79x = 118,878.78 × 50,339.88
4. Step 4: Simplify right side
   86,156.79x = 5,984,343,708.52
5. Step 5: Solve for x
   x = 5,984,343,708.52/86,156.79
6. Step 6: Final answer
   x = 69,458.76