Finding the Fourth Proportional to 9,402.84, 12,975.86 and 5,423.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.84 : 12,975.86 = 5,423.94 : x
2. Step 2: Convert to fraction form
   9,402.84/12,975.86 = 5,423.94/x
3. Step 3: Cross multiply
   9,402.84x = 12,975.86 × 5,423.94
4. Step 4: Simplify right side
   9,402.84x = 70,380,286.09
5. Step 5: Solve for x
   x = 70,380,286.09/9,402.84
6. Step 6: Final answer
   x = 7,485.00