Finding the Fourth Proportional to 45,445.56, 68,136.72 and 20,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   45,445.56 : 68,136.72 = 20,131.34 : x
2. Step 2: Convert to fraction form
   45,445.56/68,136.72 = 20,131.34/x
3. Step 3: Cross multiply
   45,445.56x = 68,136.72 × 20,131.34
4. Step 4: Simplify right side
   45,445.56x = 1,371,683,136.12
5. Step 5: Solve for x
   x = 1,371,683,136.12/45,445.56
6. Step 6: Final answer
   x = 30,183.00