Finding the Fourth Proportional to 78,249.78, 117,383.94 and 28,353.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,249.78 : 117,383.94 = 28,353.42 : x
2. Step 2: Convert to fraction form
   78,249.78/117,383.94 = 28,353.42/x
3. Step 3: Cross multiply
   78,249.78x = 117,383.94 × 28,353.42
4. Step 4: Simplify right side
   78,249.78x = 3,328,236,152.07
5. Step 5: Solve for x
   x = 3,328,236,152.07/78,249.78
6. Step 6: Final answer
   x = 42,533.49