Finding the Fourth Proportional to 78,261.78, 117,401.94 and 28,365.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,261.78 : 117,401.94 = 28,365.42 : x
2. Step 2: Convert to fraction form
   78,261.78/117,401.94 = 28,365.42/x
3. Step 3: Cross multiply
   78,261.78x = 117,401.94 × 28,365.42
4. Step 4: Simplify right side
   78,261.78x = 3,330,155,336.91
5. Step 5: Solve for x
   x = 3,330,155,336.91/78,261.78
6. Step 6: Final answer
   x = 42,551.49