Finding the Fourth Proportional to 78,258.78, 117,397.44 and 28,362.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,258.78 : 117,397.44 = 28,362.42 : x
2. Step 2: Convert to fraction form
   78,258.78/117,397.44 = 28,362.42/x
3. Step 3: Cross multiply
   78,258.78x = 117,397.44 × 28,362.42
4. Step 4: Simplify right side
   78,258.78x = 3,329,675,500.20
5. Step 5: Solve for x
   x = 3,329,675,500.20/78,258.78
6. Step 6: Final answer
   x = 42,546.99