Finding the Fourth Proportional to 139,355.02, 192,314.82 and 78,927.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,355.02 : 192,314.82 = 78,927.40 : x
2. Step 2: Convert to fraction form
   139,355.02/192,314.82 = 78,927.40/x
3. Step 3: Cross multiply
   139,355.02x = 192,314.82 × 78,927.40
4. Step 4: Simplify right side
   139,355.02x = 15,178,908,724.07
5. Step 5: Solve for x
   x = 15,178,908,724.07/139,355.02
6. Step 6: Final answer
   x = 108,922.58