Finding the Fourth Proportional to 78,456.58, 117,647.82 and 28,501.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.58 : 117,647.82 = 28,501.86 : x
2. Step 2: Convert to fraction form
   78,456.58/117,647.82 = 28,501.86/x
3. Step 3: Cross multiply
   78,456.58x = 117,647.82 × 28,501.86
4. Step 4: Simplify right side
   78,456.58x = 3,353,181,694.95
5. Step 5: Solve for x
   x = 3,353,181,694.95/78,456.58
6. Step 6: Final answer
   x = 42,739.33