Finding the Fourth Proportional to 9,212.85, 12,713.63 and 5,436

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.85 : 12,713.63 = 5,436 : x
2. Step 2: Convert to fraction form
   9,212.85/12,713.63 = 5,436/x
3. Step 3: Cross multiply
   9,212.85x = 12,713.63 × 5,436
4. Step 4: Simplify right side
   9,212.85x = 69,111,265.50
5. Step 5: Solve for x
   x = 69,111,265.50/9,212.85
6. Step 6: Final answer
   x = 7,501.62