Finding the Fourth Proportional to 9,280.86, 12,808.35 and 5,303.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,280.86 : 12,808.35 = 5,303.22 : x
2. Step 2: Convert to fraction form
   9,280.86/12,808.35 = 5,303.22/x
3. Step 3: Cross multiply
   9,280.86x = 12,808.35 × 5,303.22
4. Step 4: Simplify right side
   9,280.86x = 67,925,497.89
5. Step 5: Solve for x
   x = 67,925,497.89/9,280.86
6. Step 6: Final answer
   x = 7,318.88