Finding the Fourth Proportional to 14,136.55, 21,210.69 and 7,112.81

Step by Step Solution

1. Step 1: Write the proportion equation
   14,136.55 : 21,210.69 = 7,112.81 : x
2. Step 2: Convert to fraction form
   14,136.55/21,210.69 = 7,112.81/x
3. Step 3: Cross multiply
   14,136.55x = 21,210.69 × 7,112.81
4. Step 4: Simplify right side
   14,136.55x = 150,867,607.94
5. Step 5: Solve for x
   x = 150,867,607.94/14,136.55
6. Step 6: Final answer
   x = 10,672.17