Finding the Fourth Proportional to 9,471.86, 13,072.05 and 5,280.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,471.86 : 13,072.05 = 5,280.02 : x
2. Step 2: Convert to fraction form
   9,471.86/13,072.05 = 5,280.02/x
3. Step 3: Cross multiply
   9,471.86x = 13,072.05 × 5,280.02
4. Step 4: Simplify right side
   9,471.86x = 69,020,685.44
5. Step 5: Solve for x
   x = 69,020,685.44/9,471.86
6. Step 6: Final answer
   x = 7,286.92