Finding the Fourth Proportional to 9,211.80, 12,713.94 and 5,434.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,211.80 : 12,713.94 = 5,434.74 : x
2. Step 2: Convert to fraction form
   9,211.80/12,713.94 = 5,434.74/x
3. Step 3: Cross multiply
   9,211.80x = 12,713.94 × 5,434.74
4. Step 4: Simplify right side
   9,211.80x = 69,096,958.28
5. Step 5: Solve for x
   x = 69,096,958.28/9,211.80
6. Step 6: Final answer
   x = 7,500.92