Finding the Fourth Proportional to 103,674.85, 155,676.30 and 78,743.05

Step by Step Solution

1. Step 1: Write the proportion equation
   103,674.85 : 155,676.30 = 78,743.05 : x
2. Step 2: Convert to fraction form
   103,674.85/155,676.30 = 78,743.05/x
3. Step 3: Cross multiply
   103,674.85x = 155,676.30 × 78,743.05
4. Step 4: Simplify right side
   103,674.85x = 12,258,426,674.72
5. Step 5: Solve for x
   x = 12,258,426,674.72/103,674.85
6. Step 6: Final answer
   x = 118,239.16