Finding the Fourth Proportional to 9,436.77, 13,021.29 and 5,457.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,436.77 : 13,021.29 = 5,457.12 : x
2. Step 2: Convert to fraction form
   9,436.77/13,021.29 = 5,457.12/x
3. Step 3: Cross multiply
   9,436.77x = 13,021.29 × 5,457.12
4. Step 4: Simplify right side
   9,436.77x = 71,058,766.50
5. Step 5: Solve for x
   x = 71,058,766.50/9,436.77
6. Step 6: Final answer
   x = 7,529.99