Finding the Fourth Proportional to 10,806.51, 14,915.76 and 7,039.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,806.51 : 14,915.76 = 7,039.06 : x
2. Step 2: Convert to fraction form
   10,806.51/14,915.76 = 7,039.06/x
3. Step 3: Cross multiply
   10,806.51x = 14,915.76 × 7,039.06
4. Step 4: Simplify right side
   10,806.51x = 104,992,929.59
5. Step 5: Solve for x
   x = 104,992,929.59/10,806.51
6. Step 6: Final answer
   x = 9,715.71