Finding the Fourth Proportional to 139,707.32, 192,800.31 and 86,023.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,707.32 : 192,800.31 = 86,023.31 : x
2. Step 2: Convert to fraction form
   139,707.32/192,800.31 = 86,023.31/x
3. Step 3: Cross multiply
   139,707.32x = 192,800.31 × 86,023.31
4. Step 4: Simplify right side
   139,707.32x = 16,585,320,835.23
5. Step 5: Solve for x
   x = 16,585,320,835.23/139,707.32
6. Step 6: Final answer
   x = 118,714.76