Finding the Fourth Proportional to 11,077.87, 15,275.01 and 9,055

Step by Step Solution

1. Step 1: Write the proportion equation
   11,077.87 : 15,275.01 = 9,055 : x
2. Step 2: Convert to fraction form
   11,077.87/15,275.01 = 9,055/x
3. Step 3: Cross multiply
   11,077.87x = 15,275.01 × 9,055
4. Step 4: Simplify right side
   11,077.87x = 138,315,215.55
5. Step 5: Solve for x
   x = 138,315,215.55/11,077.87
6. Step 6: Final answer
   x = 12,485.72