Finding the Fourth Proportional to 9,402.30, 12,975.71 and 5,423.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.30 : 12,975.71 = 5,423.58 : x
2. Step 2: Convert to fraction form
   9,402.30/12,975.71 = 5,423.58/x
3. Step 3: Cross multiply
   9,402.30x = 12,975.71 × 5,423.58
4. Step 4: Simplify right side
   9,402.30x = 70,374,749.92
5. Step 5: Solve for x
   x = 70,374,749.92/9,402.30
6. Step 6: Final answer
   x = 7,484.85