Finding the Fourth Proportional to 9,247.86, 12,764.70 and 5,271.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,247.86 : 12,764.70 = 5,271.57 : x
2. Step 2: Convert to fraction form
   9,247.86/12,764.70 = 5,271.57/x
3. Step 3: Cross multiply
   9,247.86x = 12,764.70 × 5,271.57
4. Step 4: Simplify right side
   9,247.86x = 67,290,009.58
5. Step 5: Solve for x
   x = 67,290,009.58/9,247.86
6. Step 6: Final answer
   x = 7,276.28