Finding the Fourth Proportional to 139,786.54, 192,898.74 and 76,123.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,786.54 : 192,898.74 = 76,123.96 : x
2. Step 2: Convert to fraction form
   139,786.54/192,898.74 = 76,123.96/x
3. Step 3: Cross multiply
   139,786.54x = 192,898.74 × 76,123.96
4. Step 4: Simplify right side
   139,786.54x = 14,684,215,967.81
5. Step 5: Solve for x
   x = 14,684,215,967.81/139,786.54
6. Step 6: Final answer
   x = 105,047.42