Finding the Fourth Proportional to 12,578.42, 17,356.83 and 7,542.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.42 : 17,356.83 = 7,542.86 : x
2. Step 2: Convert to fraction form
   12,578.42/17,356.83 = 7,542.86/x
3. Step 3: Cross multiply
   12,578.42x = 17,356.83 × 7,542.86
4. Step 4: Simplify right side
   12,578.42x = 130,920,051.95
5. Step 5: Solve for x
   x = 130,920,051.95/12,578.42
6. Step 6: Final answer
   x = 10,408.31