Finding the Fourth Proportional to 10,090.75, 15,139.37 and 3,072.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,090.75 : 15,139.37 = 3,072.12 : x
2. Step 2: Convert to fraction form
   10,090.75/15,139.37 = 3,072.12/x
3. Step 3: Cross multiply
   10,090.75x = 15,139.37 × 3,072.12
4. Step 4: Simplify right side
   10,090.75x = 46,510,018.14
5. Step 5: Solve for x
   x = 46,510,018.14/10,090.75
6. Step 6: Final answer
   x = 4,609.17