Finding the Fourth Proportional to 139,667.60, 192,743.08 and 76,007.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,667.60 : 192,743.08 = 76,007.12 : x
2. Step 2: Convert to fraction form
   139,667.60/192,743.08 = 76,007.12/x
3. Step 3: Cross multiply
   139,667.60x = 192,743.08 × 76,007.12
4. Step 4: Simplify right side
   139,667.60x = 14,649,846,410.73
5. Step 5: Solve for x
   x = 14,649,846,410.73/139,667.60
6. Step 6: Final answer
   x = 104,890.80