Finding the Fourth Proportional to 9,259.95, 12,776.31 and 5,280.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,259.95 : 12,776.31 = 5,280.32 : x
2. Step 2: Convert to fraction form
   9,259.95/12,776.31 = 5,280.32/x
3. Step 3: Cross multiply
   9,259.95x = 12,776.31 × 5,280.32
4. Step 4: Simplify right side
   9,259.95x = 67,462,941.34
5. Step 5: Solve for x
   x = 67,462,941.34/9,259.95
6. Step 6: Final answer
   x = 7,285.45