Finding the Fourth Proportional to 139,667.28, 192,740.49 and 76,005.06

Step by Step Solution

1. Step 1: Write the proportion equation
   139,667.28 : 192,740.49 = 76,005.06 : x
2. Step 2: Convert to fraction form
   139,667.28/192,740.49 = 76,005.06/x
3. Step 3: Cross multiply
   139,667.28x = 192,740.49 × 76,005.06
4. Step 4: Simplify right side
   139,667.28x = 14,649,252,506.88
5. Step 5: Solve for x
   x = 14,649,252,506.88/139,667.28
6. Step 6: Final answer
   x = 104,886.79