Finding the Fourth Proportional to 10,806.31, 14,925.13 and 7,215.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,806.31 : 14,925.13 = 7,215.02 : x
2. Step 2: Convert to fraction form
   10,806.31/14,925.13 = 7,215.02/x
3. Step 3: Cross multiply
   10,806.31x = 14,925.13 × 7,215.02
4. Step 4: Simplify right side
   10,806.31x = 107,685,111.45
5. Step 5: Solve for x
   x = 107,685,111.45/10,806.31
6. Step 6: Final answer
   x = 9,965.02