Finding the Fourth Proportional to 7,007.48, 10,512.18 and 3,111.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,007.48 : 10,512.18 = 3,111.80 : x
2. Step 2: Convert to fraction form
   7,007.48/10,512.18 = 3,111.80/x
3. Step 3: Cross multiply
   7,007.48x = 10,512.18 × 3,111.80
4. Step 4: Simplify right side
   7,007.48x = 32,711,801.72
5. Step 5: Solve for x
   x = 32,711,801.72/7,007.48
6. Step 6: Final answer
   x = 4,668.13