Finding the Fourth Proportional to 7,142.60, 10,716.72 and 2,212.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.60 : 10,716.72 = 2,212.62 : x
2. Step 2: Convert to fraction form
   7,142.60/10,716.72 = 2,212.62/x
3. Step 3: Cross multiply
   7,142.60x = 10,716.72 × 2,212.62
4. Step 4: Simplify right side
   7,142.60x = 23,712,043.91
5. Step 5: Solve for x
   x = 23,712,043.91/7,142.60
6. Step 6: Final answer
   x = 3,319.81