Finding the Fourth Proportional to 9,416.27, 12,990.56 and 5,434.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,416.27 : 12,990.56 = 5,434.56 : x
2. Step 2: Convert to fraction form
   9,416.27/12,990.56 = 5,434.56/x
3. Step 3: Cross multiply
   9,416.27x = 12,990.56 × 5,434.56
4. Step 4: Simplify right side
   9,416.27x = 70,597,977.75
5. Step 5: Solve for x
   x = 70,597,977.75/9,416.27
6. Step 6: Final answer
   x = 7,497.45