Finding the Fourth Proportional to 9,020, 12,449.80 and 5,485.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,020 : 12,449.80 = 5,485.56 : x
2. Step 2: Convert to fraction form
   9,020/12,449.80 = 5,485.56/x
3. Step 3: Cross multiply
   9,020x = 12,449.80 × 5,485.56
4. Step 4: Simplify right side
   9,020x = 68,294,124.89
5. Step 5: Solve for x
   x = 68,294,124.89/9,020
6. Step 6: Final answer
   x = 7,571.41