Finding the Fourth Proportional to 9,211.91, 12,710.84 and 5,434.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,211.91 : 12,710.84 = 5,434.79 : x
2. Step 2: Convert to fraction form
   9,211.91/12,710.84 = 5,434.79/x
3. Step 3: Cross multiply
   9,211.91x = 12,710.84 × 5,434.79
4. Step 4: Simplify right side
   9,211.91x = 69,080,655.40
5. Step 5: Solve for x
   x = 69,080,655.40/9,211.91
6. Step 6: Final answer
   x = 7,499.06