Finding the Fourth Proportional to 78,467.82, 117,664.88 and 28,512.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,467.82 : 117,664.88 = 28,512.69 : x
2. Step 2: Convert to fraction form
   78,467.82/117,664.88 = 28,512.69/x
3. Step 3: Cross multiply
   78,467.82x = 117,664.88 × 28,512.69
4. Step 4: Simplify right side
   78,467.82x = 3,354,942,104.76
5. Step 5: Solve for x
   x = 3,354,942,104.76/78,467.82
6. Step 6: Final answer
   x = 42,755.64