Finding the Fourth Proportional to 139,628.53, 192,687.83 and 75,966.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,628.53 : 192,687.83 = 75,966.31 : x
2. Step 2: Convert to fraction form
   139,628.53/192,687.83 = 75,966.31/x
3. Step 3: Cross multiply
   139,628.53x = 192,687.83 × 75,966.31
4. Step 4: Simplify right side
   139,628.53x = 14,637,783,427.01
5. Step 5: Solve for x
   x = 14,637,783,427.01/139,628.53
6. Step 6: Final answer
   x = 104,833.76