Finding the Fourth Proportional to 106,747.59, 159,991.91 and 78,404.84

Step by Step Solution

1. Step 1: Write the proportion equation
   106,747.59 : 159,991.91 = 78,404.84 : x
2. Step 2: Convert to fraction form
   106,747.59/159,991.91 = 78,404.84/x
3. Step 3: Cross multiply
   106,747.59x = 159,991.91 × 78,404.84
4. Step 4: Simplify right side
   106,747.59x = 12,544,138,912.86
5. Step 5: Solve for x
   x = 12,544,138,912.86/106,747.59
6. Step 6: Final answer
   x = 117,512.15