Finding the Fourth Proportional to 9,406.72, 12,981.28 and 5,214.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,406.72 : 12,981.28 = 5,214.97 : x
2. Step 2: Convert to fraction form
   9,406.72/12,981.28 = 5,214.97/x
3. Step 3: Cross multiply
   9,406.72x = 12,981.28 × 5,214.97
4. Step 4: Simplify right side
   9,406.72x = 67,696,985.76
5. Step 5: Solve for x
   x = 67,696,985.76/9,406.72
6. Step 6: Final answer
   x = 7,196.66