Finding the Fourth Proportional to 19,617.72, 29,429.28 and 7,136.16

Step by Step Solution

1. Step 1: Write the proportion equation
   19,617.72 : 29,429.28 = 7,136.16 : x
2. Step 2: Convert to fraction form
   19,617.72/29,429.28 = 7,136.16/x
3. Step 3: Cross multiply
   19,617.72x = 29,429.28 × 7,136.16
4. Step 4: Simplify right side
   19,617.72x = 210,012,050.76
5. Step 5: Solve for x
   x = 210,012,050.76/19,617.72
6. Step 6: Final answer
   x = 10,705.22