Finding the Fourth Proportional to 139,487.47, 192,571.82 and 106,720.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,487.47 : 192,571.82 = 106,720.29 : x
2. Step 2: Convert to fraction form
   139,487.47/192,571.82 = 106,720.29/x
3. Step 3: Cross multiply
   139,487.47x = 192,571.82 × 106,720.29
4. Step 4: Simplify right side
   139,487.47x = 20,551,320,476.23
5. Step 5: Solve for x
   x = 20,551,320,476.23/139,487.47
6. Step 6: Final answer
   x = 147,334.53