Finding the Fourth Proportional to 9,212.80, 12,713.74 and 5,233.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.80 : 12,713.74 = 5,233.98 : x
2. Step 2: Convert to fraction form
   9,212.80/12,713.74 = 5,233.98/x
3. Step 3: Cross multiply
   9,212.80x = 12,713.74 × 5,233.98
4. Step 4: Simplify right side
   9,212.80x = 66,543,460.89
5. Step 5: Solve for x
   x = 66,543,460.89/9,212.80
6. Step 6: Final answer
   x = 7,222.94