Finding the Fourth Proportional to 105,076.92, 157,408.02 and 78,811.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,076.92 : 157,408.02 = 78,811.32 : x
2. Step 2: Convert to fraction form
   105,076.92/157,408.02 = 78,811.32/x
3. Step 3: Cross multiply
   105,076.92x = 157,408.02 × 78,811.32
4. Step 4: Simplify right side
   105,076.92x = 12,405,533,834.79
5. Step 5: Solve for x
   x = 12,405,533,834.79/105,076.92
6. Step 6: Final answer
   x = 118,061.45