Finding the Fourth Proportional to 9,280.72, 12,805.32 and 5,300.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,280.72 : 12,805.32 = 5,300.56 : x
2. Step 2: Convert to fraction form
   9,280.72/12,805.32 = 5,300.56/x
3. Step 3: Cross multiply
   9,280.72x = 12,805.32 × 5,300.56
4. Step 4: Simplify right side
   9,280.72x = 67,875,366.98
5. Step 5: Solve for x
   x = 67,875,366.98/9,280.72
6. Step 6: Final answer
   x = 7,313.59