Finding the Fourth Proportional to 139,803.89, 192,931.57 and 76,141.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,803.89 : 192,931.57 = 76,141.64 : x
2. Step 2: Convert to fraction form
   139,803.89/192,931.57 = 76,141.64/x
3. Step 3: Cross multiply
   139,803.89x = 192,931.57 × 76,141.64
4. Step 4: Simplify right side
   139,803.89x = 14,690,126,147.57
5. Step 5: Solve for x
   x = 14,690,126,147.57/139,803.89
6. Step 6: Final answer
   x = 105,076.66