Finding the Fourth Proportional to 139,667.92, 192,741.60 and 76,005.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,667.92 : 192,741.60 = 76,005.60 : x
2. Step 2: Convert to fraction form
   139,667.92/192,741.60 = 76,005.60/x
3. Step 3: Cross multiply
   139,667.92x = 192,741.60 × 76,005.60
4. Step 4: Simplify right side
   139,667.92x = 14,649,440,952.96
5. Step 5: Solve for x
   x = 14,649,440,952.96/139,667.92
6. Step 6: Final answer
   x = 104,887.66