Finding the Fourth Proportional to 9,401.64, 12,971.30 and 5,422.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.64 : 12,971.30 = 5,422.22 : x
2. Step 2: Convert to fraction form
   9,401.64/12,971.30 = 5,422.22/x
3. Step 3: Cross multiply
   9,401.64x = 12,971.30 × 5,422.22
4. Step 4: Simplify right side
   9,401.64x = 70,333,242.29
5. Step 5: Solve for x
   x = 70,333,242.29/9,401.64
6. Step 6: Final answer
   x = 7,480.95