Finding the Fourth Proportional to 139,783.40, 192,903.40 and 79,355.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,783.40 : 192,903.40 = 79,355.84 : x
2. Step 2: Convert to fraction form
   139,783.40/192,903.40 = 79,355.84/x
3. Step 3: Cross multiply
   139,783.40x = 192,903.40 × 79,355.84
4. Step 4: Simplify right side
   139,783.40x = 15,308,011,345.86
5. Step 5: Solve for x
   x = 15,308,011,345.86/139,783.40
6. Step 6: Final answer
   x = 109,512.37