Finding the Fourth Proportional to 7,620.63, 10,535.72 and 5,628.03

Step by Step Solution

1. Step 1: Write the proportion equation
   7,620.63 : 10,535.72 = 5,628.03 : x
2. Step 2: Convert to fraction form
   7,620.63/10,535.72 = 5,628.03/x
3. Step 3: Cross multiply
   7,620.63x = 10,535.72 × 5,628.03
4. Step 4: Simplify right side
   7,620.63x = 59,295,320.09
5. Step 5: Solve for x
   x = 59,295,320.09/7,620.63
6. Step 6: Final answer
   x = 7,780.89