Finding the Fourth Proportional to 9,120.50, 12,579.24 and 5,762.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.50 : 12,579.24 = 5,762.09 : x
2. Step 2: Convert to fraction form
   9,120.50/12,579.24 = 5,762.09/x
3. Step 3: Cross multiply
   9,120.50x = 12,579.24 × 5,762.09
4. Step 4: Simplify right side
   9,120.50x = 72,482,713.01
5. Step 5: Solve for x
   x = 72,482,713.01/9,120.50
6. Step 6: Final answer
   x = 7,947.23