Finding the Fourth Proportional to 9,715, 13,406.72 and 5,299

Step by Step Solution

1. Step 1: Write the proportion equation
   9,715 : 13,406.72 = 5,299 : x
2. Step 2: Convert to fraction form
   9,715/13,406.72 = 5,299/x
3. Step 3: Cross multiply
   9,715x = 13,406.72 × 5,299
4. Step 4: Simplify right side
   9,715x = 71,042,209.28
5. Step 5: Solve for x
   x = 71,042,209.28/9,715
6. Step 6: Final answer
   x = 7,312.63