Finding the Fourth Proportional to 78,630.45, 117,874.82 and 28,675.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,630.45 : 117,874.82 = 28,675.49 : x
2. Step 2: Convert to fraction form
   78,630.45/117,874.82 = 28,675.49/x
3. Step 3: Cross multiply
   78,630.45x = 117,874.82 × 28,675.49
4. Step 4: Simplify right side
   78,630.45x = 3,380,118,222.16
5. Step 5: Solve for x
   x = 3,380,118,222.16/78,630.45
6. Step 6: Final answer
   x = 42,987.40