Finding the Fourth Proportional to 139,760.32, 192,873.36 and 76,100.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,760.32 : 192,873.36 = 76,100.80 : x
2. Step 2: Convert to fraction form
   139,760.32/192,873.36 = 76,100.80/x
3. Step 3: Cross multiply
   139,760.32x = 192,873.36 × 76,100.80
4. Step 4: Simplify right side
   139,760.32x = 14,677,816,994.69
5. Step 5: Solve for x
   x = 14,677,816,994.69/139,760.32
6. Step 6: Final answer
   x = 105,021.35