Finding the Fourth Proportional to 12,577.80, 17,356.56 and 7,542.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,577.80 : 17,356.56 = 7,542.42 : x
2. Step 2: Convert to fraction form
   12,577.80/17,356.56 = 7,542.42/x
3. Step 3: Cross multiply
   12,577.80x = 17,356.56 × 7,542.42
4. Step 4: Simplify right side
   12,577.80x = 130,910,465.28
5. Step 5: Solve for x
   x = 130,910,465.28/12,577.80
6. Step 6: Final answer
   x = 10,408.06