Finding the Fourth Proportional to 5,287.86, 7,939.56 and 5,194.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,287.86 : 7,939.56 = 5,194.54 : x
2. Step 2: Convert to fraction form
   5,287.86/7,939.56 = 5,194.54/x
3. Step 3: Cross multiply
   5,287.86x = 7,939.56 × 5,194.54
4. Step 4: Simplify right side
   5,287.86x = 41,242,362.00
5. Step 5: Solve for x
   x = 41,242,362.00/5,287.86
6. Step 6: Final answer
   x = 7,799.44