Finding the Fourth Proportional to 11,410.10, 17,111.10 and 7,900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,410.10 : 17,111.10 = 7,900.10 : x
2. Step 2: Convert to fraction form
   11,410.10/17,111.10 = 7,900.10/x
3. Step 3: Cross multiply
   11,410.10x = 17,111.10 × 7,900.10
4. Step 4: Simplify right side
   11,410.10x = 135,179,401.11
5. Step 5: Solve for x
   x = 135,179,401.11/11,410.10
6. Step 6: Final answer
   x = 11,847.35