Finding the Fourth Proportional to 139,808.46, 192,937.86 and 76,146.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,808.46 : 192,937.86 = 76,146.18 : x
2. Step 2: Convert to fraction form
   139,808.46/192,937.86 = 76,146.18/x
3. Step 3: Cross multiply
   139,808.46x = 192,937.86 × 76,146.18
4. Step 4: Simplify right side
   139,808.46x = 14,691,481,016.37
5. Step 5: Solve for x
   x = 14,691,481,016.37/139,808.46
6. Step 6: Final answer
   x = 105,082.92