Finding the Fourth Proportional to 139,697.58, 192,786.82 and 86,013.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,697.58 : 192,786.82 = 86,013.56 : x
2. Step 2: Convert to fraction form
   139,697.58/192,786.82 = 86,013.56/x
3. Step 3: Cross multiply
   139,697.58x = 192,786.82 × 86,013.56
4. Step 4: Simplify right side
   139,697.58x = 16,582,280,709.28
5. Step 5: Solve for x
   x = 16,582,280,709.28/139,697.58
6. Step 6: Final answer
   x = 118,701.27