Finding the Fourth Proportional to 9,402.66, 12,971.25 and 5,422.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.66 : 12,971.25 = 5,422.32 : x
2. Step 2: Convert to fraction form
   9,402.66/12,971.25 = 5,422.32/x
3. Step 3: Cross multiply
   9,402.66x = 12,971.25 × 5,422.32
4. Step 4: Simplify right side
   9,402.66x = 70,334,268.30
5. Step 5: Solve for x
   x = 70,334,268.30/9,402.66
6. Step 6: Final answer
   x = 7,480.25