Finding the Fourth Proportional to 7,111.88, 10,662.80 and 2,429.64

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.88 : 10,662.80 = 2,429.64 : x
2. Step 2: Convert to fraction form
   7,111.88/10,662.80 = 2,429.64/x
3. Step 3: Cross multiply
   7,111.88x = 10,662.80 × 2,429.64
4. Step 4: Simplify right side
   7,111.88x = 25,906,765.39
5. Step 5: Solve for x
   x = 25,906,765.39/7,111.88
6. Step 6: Final answer
   x = 3,642.75