Finding the Fourth Proportional to 139,389.34, 192,343.41 and 78,947.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,389.34 : 192,343.41 = 78,947.92 : x
2. Step 2: Convert to fraction form
   139,389.34/192,343.41 = 78,947.92/x
3. Step 3: Cross multiply
   139,389.34x = 192,343.41 × 78,947.92
4. Step 4: Simplify right side
   139,389.34x = 15,185,112,145.21
5. Step 5: Solve for x
   x = 15,185,112,145.21/139,389.34
6. Step 6: Final answer
   x = 108,940.27