Finding the Fourth Proportional to 5,111.40, 7,662.96 and 3,159.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.40 : 7,662.96 = 3,159.48 : x
2. Step 2: Convert to fraction form
   5,111.40/7,662.96 = 3,159.48/x
3. Step 3: Cross multiply
   5,111.40x = 7,662.96 × 3,159.48
4. Step 4: Simplify right side
   5,111.40x = 24,210,968.86
5. Step 5: Solve for x
   x = 24,210,968.86/5,111.40
6. Step 6: Final answer
   x = 4,736.66