Finding the Fourth Proportional to 12,136.37, 16,742.53 and 7,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,136.37 : 16,742.53 = 7,100.78 : x
2. Step 2: Convert to fraction form
   12,136.37/16,742.53 = 7,100.78/x
3. Step 3: Cross multiply
   12,136.37x = 16,742.53 × 7,100.78
4. Step 4: Simplify right side
   12,136.37x = 118,885,022.17
5. Step 5: Solve for x
   x = 118,885,022.17/12,136.37
6. Step 6: Final answer
   x = 9,795.76