Finding the Fourth Proportional to 103,676.35, 155,678.55 and 78,744.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103,676.35 : 155,678.55 = 78,744.55 : x
2. Step 2: Convert to fraction form
   103,676.35/155,678.55 = 78,744.55/x
3. Step 3: Cross multiply
   103,676.35x = 155,678.55 × 78,744.55
4. Step 4: Simplify right side
   103,676.35x = 12,258,837,364.40
5. Step 5: Solve for x
   x = 12,258,837,364.40/103,676.35
6. Step 6: Final answer
   x = 118,241.41