Finding the Fourth Proportional to 9,320.69, 12,862.79 and 5,071.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,320.69 : 12,862.79 = 5,071.99 : x
2. Step 2: Convert to fraction form
   9,320.69/12,862.79 = 5,071.99/x
3. Step 3: Cross multiply
   9,320.69x = 12,862.79 × 5,071.99
4. Step 4: Simplify right side
   9,320.69x = 65,239,942.25
5. Step 5: Solve for x
   x = 65,239,942.25/9,320.69
6. Step 6: Final answer
   x = 6,999.48