Finding the Fourth Proportional to 7,145.04, 9,863.52 and 4,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,145.04 : 9,863.52 = 4,788.72 : x
2. Step 2: Convert to fraction form
   7,145.04/9,863.52 = 4,788.72/x
3. Step 3: Cross multiply
   7,145.04x = 9,863.52 × 4,788.72
4. Step 4: Simplify right side
   7,145.04x = 47,233,635.49
5. Step 5: Solve for x
   x = 47,233,635.49/7,145.04
6. Step 6: Final answer
   x = 6,610.69