Finding the Fourth Proportional to 9,136.56, 13,705.30 and 2,980.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.56 : 13,705.30 = 2,980.56 : x
2. Step 2: Convert to fraction form
   9,136.56/13,705.30 = 2,980.56/x
3. Step 3: Cross multiply
   9,136.56x = 13,705.30 × 2,980.56
4. Step 4: Simplify right side
   9,136.56x = 40,849,488.33
5. Step 5: Solve for x
   x = 40,849,488.33/9,136.56
6. Step 6: Final answer
   x = 4,470.99