Finding the Fourth Proportional to 12,077.30, 18,101.55 and 5,057.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,077.30 : 18,101.55 = 5,057.30 : x
2. Step 2: Convert to fraction form
   12,077.30/18,101.55 = 5,057.30/x
3. Step 3: Cross multiply
   12,077.30x = 18,101.55 × 5,057.30
4. Step 4: Simplify right side
   12,077.30x = 91,544,968.82
5. Step 5: Solve for x
   x = 91,544,968.82/12,077.30
6. Step 6: Final answer
   x = 7,579.92