Finding the Fourth Proportional to 9,401.70, 12,975.57 and 5,422.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.70 : 12,975.57 = 5,422.86 : x
2. Step 2: Convert to fraction form
   9,401.70/12,975.57 = 5,422.86/x
3. Step 3: Cross multiply
   9,401.70x = 12,975.57 × 5,422.86
4. Step 4: Simplify right side
   9,401.70x = 70,364,699.53
5. Step 5: Solve for x
   x = 70,364,699.53/9,401.70
6. Step 6: Final answer
   x = 7,484.25