Finding the Fourth Proportional to 139,410.46, 192,287.91 and 85,725.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,410.46 : 192,287.91 = 85,725.82 : x
2. Step 2: Convert to fraction form
   139,410.46/192,287.91 = 85,725.82/x
3. Step 3: Cross multiply
   139,410.46x = 192,287.91 × 85,725.82
4. Step 4: Simplify right side
   139,410.46x = 16,484,038,760.84
5. Step 5: Solve for x
   x = 16,484,038,760.84/139,410.46
6. Step 6: Final answer
   x = 118,241.05