Finding the Fourth Proportional to 139,172.88, 192,215.06 and 93,771.37

Step by Step Solution

1. Step 1: Write the proportion equation
   139,172.88 : 192,215.06 = 93,771.37 : x
2. Step 2: Convert to fraction form
   139,172.88/192,215.06 = 93,771.37/x
3. Step 3: Cross multiply
   139,172.88x = 192,215.06 × 93,771.37
4. Step 4: Simplify right side
   139,172.88x = 18,024,269,510.83
5. Step 5: Solve for x
   x = 18,024,269,510.83/139,172.88
6. Step 6: Final answer
   x = 129,509.93