Finding the Fourth Proportional to 12,878.48, 17,772.36 and 7,290.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878.48 : 17,772.36 = 7,290.56 : x
2. Step 2: Convert to fraction form
   12,878.48/17,772.36 = 7,290.56/x
3. Step 3: Cross multiply
   12,878.48x = 17,772.36 × 7,290.56
4. Step 4: Simplify right side
   12,878.48x = 129,570,456.92
5. Step 5: Solve for x
   x = 129,570,456.92/12,878.48
6. Step 6: Final answer
   x = 10,061.01